Check if there is already a meth_name method in the current class
           It is useful before allowing to rename a method to check name does
           not already exist.

def method_name_exist(self, meth_name):
        """Check if there is already a meth_name method in the current class
           It is useful before allowing to rename a method to check name does
           not already exist.
        """

        methods = self.current_class.get_methods()
        for m in methods:
            if m.name == meth_name:
                return True
        return False