class_docstr: Magic part of the protocol for multiple value returns.
  
  See `ProgramBuilder.__call__`.
code: def pattern(self):
      pass
  
imports: import collections
  import contextlib
  import inspect
  from tensorflow_probability.python.experimental.auto_batching import instructions
label_desc: Use image node_id 2 for calling the _MagicPattern obj's underlying member method code with example usage: obj.pattern() without return types