diff --git a/.github/workflows/ci-gpu.yml b/.github/workflows/ci-gpu.yml
index 3c3e193..554b6dd 100644
--- a/.github/workflows/ci-gpu.yml
+++ b/.github/workflows/ci-gpu.yml
@@ -47,7 +47,7 @@ jobs:
         with:
           enable-cache: true  # "auto" is `false` on non-GitHub runners
       - name: Install package
-        run: uv pip install --system -e .[test,full] cupy-cuda12x --extra-index-url=https://pypi.nvidia.com --index-strategy=unsafe-best-match
+        run: uv pip install --system --group=test -e .[full] cupy-cuda12x --extra-index-url=https://pypi.nvidia.com --index-strategy=unsafe-best-match
       - name: List installed packages
         run: uv pip list
       - name: Run tests
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a4e24fe..a902689 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,7 +18,7 @@ jobs:
       envs: ${{ steps.get-envs.outputs.envs }}
       pythons: ${{ steps.get-pythons.outputs.pythons }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with: { fetch-depth: 0, filter: "blob:none" }
       - uses: astral-sh/setup-uv@v7
       - name: Get test environments
@@ -50,7 +50,7 @@ jobs:
               python: "3.13"
             os: macos-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with: { fetch-depth: 0, filter: "blob:none" }
       - uses: astral-sh/setup-uv@v7
         with:
@@ -73,13 +73,13 @@ jobs:
     name: CPU Benchmarks
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with: { fetch-depth: 0, filter: "blob:none" }
       - uses: actions/setup-python@v6
         with:
           python-version: '3.13'
       - uses: astral-sh/setup-uv@v7
-      - run: uv pip install --system -e .[test,full]
+      - run: uv pip install --system --group=test -e .[full]
       - uses: CodSpeedHQ/action@v3
         with:
           run: pytest -m benchmark --codspeed -n auto
@@ -88,7 +88,7 @@ jobs:
     name: Import Tests
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with: { fetch-depth: 0, filter: "blob:none" }
       - uses: actions/setup-python@v6
         with:
@@ -100,20 +100,15 @@ jobs:
       - run: python -c 'import testing.fast_array_utils as tfau; print(tfau.ArrayType("numpy", "ndarray"))'
   check:
     name: Static Checks
-    needs: get-environments
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        python-version: ${{ fromJSON(needs.get-environments.outputs.pythons) }}
     env:
       SKIP: no-commit-to-branch  # this CI runs on the main branch
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with: { fetch-depth: 0, filter: "blob:none" }
-      - uses: actions/setup-python@v6
+      - uses: j178/prek-action@v1
         with:
-          python-version: ${{ matrix.python-version }}
-      - uses: pre-commit/action@v3.0.1
+          working-directory: ${{ github.workspace }}
   pass:
     name: All Checks
     if: always()
diff --git a/.gitignore b/.gitignore
index c7ff898..09ee092 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,7 @@ _version.py
 /build/
 /dist/
 /.python-version
+/*.lock
 
 # Testing
 /test-data/
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 2f0718f..8d59284 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,43 +1,108 @@
 repos:
-  - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v6.0.0
-    hooks:
-      - id: end-of-file-fixer
-      - id: trailing-whitespace
-      - id: no-commit-to-branch
-  - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.14.5
-    hooks:
-      - id: ruff-check
-        args: [--fix, --exit-non-zero-on-fix]
-      - id: ruff-check
-        args: [--preview, --select=CPY]
-      - id: ruff-format
-  - repo: https://github.com/tox-dev/pyproject-fmt
-    rev: v2.11.1
-    hooks:
-      - id: pyproject-fmt
-  - repo: https://github.com/biomejs/pre-commit
-    rev: v2.3.5
-    hooks:
-      - id: biome-format
-  - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.18.2
-    hooks:
-      - id: mypy
-        args: [--config-file=pyproject.toml, .]
-        pass_filenames: false
-        additional_dependencies:
-          - pytest
-          - pytest-codspeed!=4.0.0  # https://github.com/CodSpeedHQ/pytest-codspeed/pull/84
-          - numba
-          - numpy
-          - scipy-stubs
-          - dask
-          - zarr
-          - h5py
-          - anndata
-          - types-docutils
-          - sphinx
+- repo: https://github.com/pre-commit/pre-commit-hooks
+  rev: v6.0.0
+  hooks:
+  - id: end-of-file-fixer
+  - id: trailing-whitespace
+  - id: no-commit-to-branch
+- repo: https://github.com/astral-sh/ruff-pre-commit
+  rev: v0.14.5
+  hooks:
+  - id: ruff-check
+    args: [--fix, --exit-non-zero-on-fix]
+  - id: ruff-check
+    args: [--preview, --select=CPY]
+  - id: ruff-format
+- repo: https://github.com/tox-dev/pyproject-fmt
+  rev: v2.11.1
+  hooks:
+  - id: pyproject-fmt
+- repo: https://github.com/biomejs/pre-commit
+  rev: v2.3.5
+  hooks:
+  - id: biome-format
+- repo: https://github.com/H4rryK4ne/update-mypy-hook
+  rev: a8b56c4055ff0c7c589794c02813ef8e9d5704fc
+  hooks:
+  - id: update-mypy-hook
+- repo: https://github.com/pre-commit/mirrors-mypy
+  rev: v1.18.2
+  hooks:
+  - id: mypy
+    args: [--config-file=pyproject.toml, .]
+    pass_filenames: false
+    language_version: '3.13'
+    additional_dependencies:
+    - alabaster==1.0.0
+    - anndata==0.12.6
+    - array-api-compat==1.12.0
+    - babel==2.17.0
+    - certifi==2025.11.12
+    - cffi==2.0.0
+    - charset-normalizer==3.4.4
+    - click==8.3.1
+    - cloudpickle==3.1.2
+    - colorama==0.4.6 ; sys_platform == 'win32'
+    - coverage==7.12.0
+    - dask==2025.11.0
+    - docutils==0.22.3
+    - donfig==0.8.1.post1
+    - execnet==2.1.2
+    - fsspec==2025.10.0
+    - google-crc32c==1.7.1
+    - h5py==3.15.1
+    - idna==3.11
+    - imagesize==1.4.1
+    - iniconfig==2.3.0
+    - jinja2==3.1.6
+    - joblib==1.5.2
+    - legacy-api-wrap==1.5
+    - llvmlite==0.45.1
+    - locket==1.0.0
+    - markdown-it-py==4.0.0
+    - markupsafe==3.0.3
+    - mdurl==0.1.2
+    - natsort==8.4.0
+    - numba==0.62.1
+    - numcodecs==0.16.5
+    - numpy==2.3.5
+    - numpy-typing-compat==20250818.2.3
+    - optype==0.14.0
+    - packaging==25.0
+    - pandas==2.3.3
+    - partd==1.4.2
+    - pluggy==1.6.0
+    - pycparser==2.23 ; implementation_name != 'PyPy'
+    - pygments==2.19.2
+    - pytest==9.0.1
+    - pytest-codspeed==4.2.0
+    - pytest-doctestplus==1.6.0
+    - pytest-xdist==3.8.0
+    - python-dateutil==2.9.0.post0
+    - pytz==2025.2
+    - pyyaml==6.0.3
+    - requests==2.32.5
+    - rich==14.2.0
+    - roman-numerals==3.1.0
+    - scikit-learn==1.7.2
+    - scipy==1.16.3
+    - scipy-stubs==1.16.3.2
+    - six==1.17.0
+    - snowballstemmer==3.0.1
+    - sphinx==9.0.1
+    - sphinxcontrib-applehelp==2.0.0
+    - sphinxcontrib-devhelp==2.0.0
+    - sphinxcontrib-htmlhelp==2.1.0
+    - sphinxcontrib-jsmath==1.0.1
+    - sphinxcontrib-qthelp==2.0.0
+    - sphinxcontrib-serializinghtml==2.0.0
+    - threadpoolctl==3.6.0
+    - toolz==1.1.0
+    - types-docutils==0.22.3.20251115
+    - tzdata==2025.2
+    - urllib3==2.5.0
+    - zarr==3.1.5
 ci:
-  skip: [mypy]  # too big
+  skip:
+  - mypy  # too big
+  - update-mypy-hook  # offline?
diff --git a/.readthedocs.yml b/.readthedocs.yml
index f32ea6c..1b8283c 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -3,12 +3,12 @@ build:
   os: ubuntu-24.04
   tools:
     python: "3.13"
-python:
-  install:
-    - method: pip
-      path: .
-      extra_requirements:
-        - doc
-sphinx:
-  configuration: docs/conf.py
-  fail_on_warning: true
+  jobs:
+    create_environment:
+      - asdf plugin add uv
+      - asdf install uv latest
+      - asdf global uv latest
+    build:
+      html:
+        - uvx hatch run docs:build
+        - mv docs/_build $READTHEDOCS_OUTPUT
diff --git a/docs/conf.py b/docs/conf.py
index 657de4e..77cd5cb 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -43,8 +43,6 @@
     "sphinx.ext.autodoc",
     "sphinx.ext.autosummary",
     "sphinx.ext.napoleon",
-    # "scanpydoc.definition_list_typed_field",
-    "scanpydoc.elegant_typehints",
     "sphinx_autofixture",
 ]
 
diff --git a/pyproject.toml b/pyproject.toml
index ae26151..f7d5a2f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,6 @@ build-backend = "hatchling.build"
 requires = [
   "hatch-docstring-description>=1.1.1",
   "hatch-fancy-pypi-readme",
-  "hatch-min-requirements",
   "hatch-vcs",
   "hatchling",
 ]
@@ -27,23 +26,23 @@ dynamic = [ "description", "readme", "version" ]
 dependencies = [ "numpy>=2" ]
 optional-dependencies.accel = [ "numba>=0.57" ]
 optional-dependencies.dask = [ "dask>=2023.6.1" ]
-optional-dependencies.doc = [
-  "furo>=2024.8.6",
-  "pytest>=8.4",
-  "scanpydoc>=0.15.4",
-  "sphinx>=8.2.3",
-  "sphinx-autodoc-typehints>=3.2",
-  "sphinx-autofixture>=0.4.1",
-]
 optional-dependencies.full = [ "fast-array-utils[accel,dask,sparse]", "h5py", "zarr" ]
 optional-dependencies.sparse = [ "scipy>=1.13" ]
-optional-dependencies.test = [
+optional-dependencies.testing = [ "packaging" ]
+urls.'Documentation' = "https://icb-fast-array-utils.readthedocs-hosted.com/"
+urls.'Issue Tracker' = "https://github.com/scverse/fast-array-utils/issues"
+urls.'Source Code' = "https://github.com/scverse/fast-array-utils"
+entry-points.pytest11.fast_array_utils = "testing.fast_array_utils.pytest"
+
+[dependency-groups]
+test = [
   "anndata",
-  "fast-array-utils[accel,test-min]",
-  "numcodecs<0.16",                   # zarr 2 needs this
-  "zarr<3",                           # anndata needs this
+  "fast-array-utils[accel]",
+  "scikit-learn",
+  "zarr",
+  { include-group = "test-min" },
 ]
-optional-dependencies.test-min = [
+test-min = [
   "coverage[toml]",
   "fast-array-utils[sparse,testing]", # include sparse for testing numba-less to_dense
   "pytest",
@@ -51,12 +50,21 @@ optional-dependencies.test-min = [
   "pytest-doctestplus",
   "pytest-xdist",
 ]
-optional-dependencies.testing = [ "packaging" ]
-urls.'Documentation' = "https://icb-fast-array-utils.readthedocs-hosted.com/"
-urls.'Issue Tracker' = "https://github.com/scverse/fast-array-utils/issues"
-urls.'Source Code' = "https://github.com/scverse/fast-array-utils"
-
-entry-points.pytest11.fast_array_utils = "testing.fast_array_utils.pytest"
+doc = [
+  "furo>=2024.8.6",
+  "pytest>=8.4",
+  "sphinx>=9.0.1",
+  "sphinx-autofixture>=0.4.1",
+]
+# for update-mypy-hook
+mypy = [
+  "fast-array-utils[full]",
+  "scipy-stubs",
+  # TODO: replace sphinx with this: { include-group = "doc" },
+  "sphinx",
+  "types-docutils",
+  { include-group = "test" },
+]
 
 [tool.hatch.version]
 source = "vcs"
@@ -69,7 +77,6 @@ path = "README.rst"
 start-after = ".. begin"
 
 [tool.hatch.metadata.hooks.docstring-description]
-[tool.hatch.metadata.hooks.min_requirements]
 
 [tool.hatch.build.targets.wheel]
 packages = [ "src/testing", "src/fast_array_utils" ]
@@ -78,29 +85,26 @@ packages = [ "src/testing", "src/fast_array_utils" ]
 installer = "uv"
 
 [tool.hatch.envs.docs]
-features = [ "doc" ]
+dependency-groups = [ "doc" ]
 scripts.build = "sphinx-build -M html docs docs/_build"
 scripts.clean = "git clean -fdX docs"
 scripts.open = "python -m webbrowser -t docs/_build/html/index.html"
 
 [tool.hatch.envs.hatch-test]
 default-args = [  ]
-features = [ "test-min" ]
-extra-dependencies = [ "ipykernel", "ipycytoscape" ]
+dependency-groups = [ "test-min" ]
+# TODO: remove scipy once https://github.com/pypa/hatch/pull/2127 is released
+extra-dependencies = [ "ipykernel", "ipycytoscape", "scipy" ]
 env-vars.CODSPEED_PROFILE_FOLDER = "test-data/codspeed"
 overrides.matrix.extras.features = [
   { if = [ "full" ], value = "full" },
-  { if = [ "full" ], value = "test" },
-]
-overrides.matrix.extras.dependencies = [
-  { if = [ "full" ], value = "scipy-stubs" },
-  { if = [ "full" ], value = "scikit-learn" },
 ]
-overrides.matrix.resolution.features = [
-  { if = [ "lowest" ], value = "min-reqs" }, # feature added by hatch-min-requirements
+overrides.matrix.extras.dependency-groups = [
+  { if = [ "full" ], value = "test" },
 ]
 overrides.matrix.resolution.dependencies = [
-  # TODO: move to min dep once this is fixed: https://github.com/tlambert03/hatch-min-requirements/issues/11
+  # TODO: move to `min-reqs` feature once this is fixed: https://github.com/tlambert03/hatch-min-requirements/issues/11
+  { if = [ "lowest" ], value = "numpy==2" },
   { if = [ "lowest" ], value = "dask==2023.6.1" },
   { if = [ "lowest" ], value = "scipy==1.13.0" },
 ]
@@ -114,6 +118,9 @@ python = [ "3.12" ]
 extras = [ "full" ]
 resolution = [ "lowest" ]
 
+[tool.uv]
+override-dependencies = [ "sphinx>=9.0.1" ]
+
 [tool.ruff]
 line-length = 160
 namespace-packages = [ "src/testing" ]
@@ -154,10 +161,10 @@ lint.isort.lines-after-imports = 2
 lint.pydocstyle.convention = "numpy"
 lint.future-annotations = true
 
-[tool.pytest.ini_options]
+[tool.pytest]
+strict = true
 addopts = [
   "--import-mode=importlib",
-  "--strict-markers",
   "--doctest-modules",
   "--doctest-plus",
   "--pyargs",
@@ -179,7 +186,6 @@ filterwarnings = [
 markers = [
   "benchmark: marks tests as benchmark (to run with `--codspeed`)",
 ]
-xfail_strict = true
 
 [tool.coverage]
 run.data_file = "test-data/.coverage"
diff --git a/src/fast_array_utils/types.py b/src/fast_array_utils/types.py
index 41e6c6f..c1fbf26 100644
--- a/src/fast_array_utils/types.py
+++ b/src/fast_array_utils/types.py
@@ -109,7 +109,7 @@
     from anndata.abc import CSCDataset, CSRDataset  # type: ignore[import-untyped]
 else:  # pragma: no cover
     try:  # only exists in anndata 0.11+
-        from anndata.abc import CSCDataset, CSRDataset  # type: ignore[import-untyped]
+        from anndata.abc import CSCDataset, CSRDataset
     except ImportError:
         CSRDataset = type("CSRDataset", (), {})
         CSCDataset = type("CSCDataset", (), {})
diff --git a/src/fast_array_utils/typing.py b/src/fast_array_utils/typing.py
index aebcdbb..aee112c 100644
--- a/src/fast_array_utils/typing.py
+++ b/src/fast_array_utils/typing.py
@@ -3,27 +3,22 @@
 
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Any
+from typing import Any
 
 from numpy.typing import NDArray
 
 from . import types
 
 
-if TYPE_CHECKING:
-    from typing import TypeAlias
-
-
 __all__ = ["CpuArray", "DiskArray", "GpuArray"]
 
-# change to `type` syntax once this is released: https://github.com/sphinx-doc/sphinx/pull/13508
 
-CpuArray: TypeAlias = NDArray[Any] | types.CSBase  # noqa: UP040
+type CpuArray = NDArray[Any] | types.CSBase
 """Arrays and matrices stored in CPU memory."""
 
-GpuArray: TypeAlias = types.CupyArray | types.CupyCSMatrix  # noqa: UP040
+type GpuArray = types.CupyArray | types.CupyCSMatrix
 """Arrays and matrices stored in GPU memory."""
 
 # TODO(flying-sheep): types.CSDataset  # noqa: TD003
-DiskArray: TypeAlias = types.H5Dataset | types.ZarrArray  # noqa: UP040
+type DiskArray = types.H5Dataset | types.ZarrArray  # type: ignore[type-arg]
 """Arrays and matrices stored on disk."""
diff --git a/src/testing/fast_array_utils/_array_type.py b/src/testing/fast_array_utils/_array_type.py
index b5649a3..9db7335 100644
--- a/src/testing/fast_array_utils/_array_type.py
+++ b/src/testing/fast_array_utils/_array_type.py
@@ -264,7 +264,7 @@ def _to_h5py_dataset(self, x: ArrayLike | Array, /, *, dtype: DTypeLike | None =
         return ctx.hdf5_file.create_dataset("data", arr.shape, arr.dtype, data=arr)
 
     @classmethod
-    def _to_zarr_array(cls, x: ArrayLike | Array, /, *, dtype: DTypeLike | None = None) -> types.ZarrArray:
+    def _to_zarr_array(cls, x: ArrayLike | Array, /, *, dtype: DTypeLike | None = None) -> types.ZarrArray[Any]:
         """Convert to a zarr array."""
         import zarr
 
@@ -298,8 +298,8 @@ def _to_cs_dataset(self, x: ArrayLike | Array, /, *, dtype: DTypeLike | None = N
 
         cls = cast("type[types.csr_array[Any, tuple[int, int]] | types.csc_array]", csr_array if self.cls is types.CSRDataset else csc_array)
         x_sparse = self._to_scipy_sparse(x, dtype=dtype, cls=cls)
-        anndata.io.write_elem(grp, "/", x_sparse)
-        return anndata.io.sparse_dataset(grp)
+        anndata.io.write_elem(grp, "/mtx", x_sparse)
+        return anndata.io.sparse_dataset(grp["mtx"])
 
     def _to_scipy_sparse(
         self,
diff --git a/tests/test_stats.py b/tests/test_stats.py
index 8d0a777..334d1fd 100644
--- a/tests/test_stats.py
+++ b/tests/test_stats.py
@@ -292,7 +292,7 @@ def test_mean_var_sparse_64(array_type: ArrayType[types.CSArray], axis: Literal[
 
 @pytest.mark.skipif(not find_spec("sklearn"), reason="sklearn not installed")
 @pytest.mark.array_type(Flags.Sparse, skip=Flags.Matrix | Flags.Dask | Flags.Disk | Flags.Gpu)
-def test_mean_var_sparse_32(array_type: ArrayType[types.CSArray]) -> None:
+def test_mean_var_sparse_32(array_type: ArrayType[types.CSArray], subtests: pytest.Subtests) -> None:
     """Test whether we are more accurate for 32 bit."""
     from sklearn.utils.sparsefuncs import mean_variance_axis
 
@@ -304,10 +304,11 @@ def test_mean_var_sparse_32(array_type: ArrayType[types.CSArray]) -> None:
         fau[n_bit] = stats.mean_var(mtx, axis=0)
         skl[n_bit] = mean_variance_axis(mtx, 0)
 
-    for stat, _ in enumerate(["mean", "var"]):
-        resid_fau = np.mean(np.abs(fau[64][stat] - fau[32][stat]))
-        resid_skl = np.mean(np.abs(skl[64][stat] - skl[32][stat]))
-        assert resid_fau < resid_skl
+    for stat, name in enumerate(["mean", "var"]):
+        with subtests.test(stat=name):
+            resid_fau = np.mean(np.abs(fau[64][stat] - fau[32][stat]))
+            resid_skl = np.mean(np.abs(skl[64][stat] - skl[32][stat]))
+            assert resid_fau < resid_skl
 
 
 @pytest.mark.array_type({at for at in SUPPORTED_TYPES if at.flags & Flags.Sparse and at.flags & Flags.Dask})
diff --git a/typings/cupy/_creation/from_data.pyi b/typings/cupy/_creation/from_data.pyi
index da6f030..b1ba1ab 100644
--- a/typings/cupy/_creation/from_data.pyi
+++ b/typings/cupy/_creation/from_data.pyi
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: MPL-2.0
-from typing import Literal
+from typing import Any, Literal
 
 import h5py
 import zarr
@@ -8,7 +8,7 @@ from numpy.typing import ArrayLike, DTypeLike
 from .._core import ndarray
 
 def asarray(
-    a: ArrayLike | h5py.Dataset | zarr.Array,
+    a: ArrayLike | h5py.Dataset | zarr.Array[Any],
     dtype: DTypeLike | None = None,
     order: Literal["C", "F", "A", "K"] | None = None,
     *,
diff --git a/typings/h5py.pyi b/typings/h5py.pyi
index 7e4809f..bfb92bc 100644
--- a/typings/h5py.pyi
+++ b/typings/h5py.pyi
@@ -14,7 +14,8 @@ class Dataset(HLObject):
     shape: tuple[int, ...]
     ndim: int
 
-class Group(HLObject): ...
+class Group(HLObject):
+    def __getitem__(self, name: str) -> Group | Dataset: ...
 
 class File(Group, closing[File]):  # not actually a subclass of closing
     filename: str
diff --git a/typings/sklearn/utils/sparsefuncs.pyi b/typings/sklearn/utils/sparsefuncs.pyi
index 2a73b01..51eb3cc 100644
--- a/typings/sklearn/utils/sparsefuncs.pyi
+++ b/typings/sklearn/utils/sparsefuncs.pyi
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: MPL-2.0
-from typing import Literal
+from typing import Any, Literal
 
 import numpy as np
 from numpy.typing import NDArray
@@ -8,6 +8,6 @@ from scipy.sparse import csc_array, csc_matrix, csr_array, csr_matrix
 def mean_variance_axis(
     X: csc_array | csc_matrix | csr_array | csr_matrix,  # noqa: N803
     axis: Literal[0, 1],
-    weights: NDArray[np.floating] | None = None,
+    weights: NDArray[np.floating[Any]] | None = None,
     return_sum_weights: bool = False,
 ) -> tuple[NDArray[np.float64], NDArray[np.float64]]: ...