class_docstr: Binding target for methods replaced by function and defun.
code: def __init__(self, target, original_python_function):
      self.weakrefself_target__ = target
      self.weakrefself_func__ = weakref.ref(original_python_function)
  
imports: import weakref
  from tensorflow.python.util import tf_inspect
label_desc: Use image node_id 1 to create a new TfMethodTarget object  with example: obj = TfMethodTarget(target, original_python_function)