code: def is_function_like(value):
      if value is None:
          return True
      if isinstance(value, str):
          return True
      if callable(value):
          return True
      return False
  
imports: import tree
  from keras import backend
  from keras import losses
  from keras import metrics
  from keras import ops
  from keras.utils.naming import get_object_name
label_desc: Use image node_id 1 for calling a global function with example usage: is_function_like(value) and returns: False, True, True, True