code: def _is_valid_predict_signature(signature_def):
      """Determine whether the argument is a servable 'predict' SignatureDef."""
      if (
          signature_def.method_name
          != signature_constants.PREDICT_METHOD_NAME
      ):
          return False
      if not signature_def.inputs.keys():
          return False
      if not signature_def.outputs.keys():
          return False
      return True
  
imports: from tensorflow.core.framework import types_pb2
  from tensorflow.core.protobuf import meta_graph_pb2
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import tensor
  from tensorflow.python.framework import tensor_util
  from tensorflow.python.saved_model import signature_constants
  from tensorflow.python.saved_model import utils_impl
  from tensorflow.python.util import deprecation
  from tensorflow.python.util.tf_export import tf_export
label_desc: Use image node_id 9 for calling a global function with example usage: _is_valid_predict_signature(signature_def) and returns: True, False, False, False