code: def is_callable():
      """
      A validator that raises a `attr.exceptions.NotCallableError` if the
      initializer is called with a value for this particular attribute
      that is not callable.
  
      .. versionadded:: 19.1.0
  
      :raises `attr.exceptions.NotCallableError`: With a human readable error
          message containing the attribute (`attr.Attribute`) name,
          and the value it got.
      """
      return _IsCallableValidator()
  
imports: from __future__ import absolute_import, division, print_function
  import re
  from ._make import _AndValidator, and_, attrib, attrs
  from .exceptions import NotCallableError
label_desc: Use image node_id 6 for calling a global function with example usage: is_callable() and returns: _IsCallableValidator