(self)
return self
Returns the element at the top of the callstack without removing it.

        :return: A CallStack.
Returns the element at the top of the callstack without removing it.
Returns the element at the top of the callstack without removing it .
def top(self):
        """
        Returns the element at the top of the callstack without removing it.

        :return: A CallStack.
        """
        return self
def top ( self ) : return self