class_docstr: An interface for generic schedules..
code: def __call__(self, step):
      return self.get(step)
  
imports: import abc
  import collections
  import copy
  import math
  from typing import Any, Iterable, List, Tuple, Union
  from jax import numpy
label_desc: Use image node_id 2 for calling the Schedule obj's underlying member method code with example usage: obj.__call__(step) and returns: self