Return a PyObjCMethodSignature object for given signature string.

        :param signature_str: A byte string containing the type encoding for the method signature
        :return: A method signature object, assignable to attributes like __block_signature__
        :rtype: <type objc._method_signature>

def pyobjc_method_signature(signature_str):
        """
        Return a PyObjCMethodSignature object for given signature string.

        :param signature_str: A byte string containing the type encoding for the method signature
        :return: A method signature object, assignable to attributes like __block_signature__
        :rtype: <type objc._method_signature>
        """
        _objc_so.PyObjCMethodSignature_WithMetaData.restype = ctypes.py_object
        return _objc_so.PyObjCMethodSignature_WithMetaData(ctypes.create_string_buffer(signature_str), None, False)