code: def is_internal_input(arg_name):
      return arg_name[0] == "_"
  
imports: from typing import Any, Dict, Tuple
  import numpy
  from coremltools.converters.mil.mil import types
  from coremltools.converters.mil.mil.types import is_compatible_type
  from coremltools.converters.mil.mil.types.symbolic import any_symbolic, is_symbolic
  from .None import SPACES
  from .input_type import DefaultInputs, TensorInputType, TupleInputType
  from .var import ComplexVar, InternalVar, ListVar, Var
label_desc: Use image node_id 3 for calling a global function with example usage: is_internal_input(arg_name) and returns: unknown