Navigate to back pop view controller ??

Hello, I have used the ENSwiftSideMenu and navigated to the second view controller but I was facing an issue like when I want to go back to my parent view from child view how can I go using popViewController  , Normally by using NavigationController  we used to go back   self.navigationController?.popViewController(animated:true) , but here  how can  I go please help me asap urgent .!!!