def _get_op_from_signature_def(meta_graph_def, op_signature_key, import_scope): """Retrieve op stored in the imported meta graph's signature def.""" if op_signature_key in meta_graph_def.signature_def: return signature_def_utils.load_op_from_signature_def( meta_graph_def.signature_def[op_signature_key], op_signature_key, import_scope) else: return None