class_docstr: Use callable object instead of nested function, it can be pickled.
code: def __call__(self, x, *args):
      if args:
          return (self._fn(x),) + args
      return self._fn(x)
  
imports: import os
  from ...None import recordio, ndarray
  from ...util import default_array
label_desc: Use image node_id 2 for calling the _TransformFirstClosure obj's underlying member method code with example usage: obj.__call__(x) and returns: self, unknown