New DropoutStack has been successfully created.
New element has been pushed onto the DropoutStack successfully.
The current size of the DropoutStack after the push is: 1
The top element of the DropoutStack has been popped successfully.
The current size of the DropoutStack after the pop is: 0
The DropoutStack is now empty.
Peek of the empty DropoutStack has caused the correct exception.