class_docstr: The Implementation defines the interface for all implementation classes.
class_docstr_tok: ["The","Implementation","defines","the","interface","for","all","implementation","classes","."]
docstr: Returns keyword-ed variable.
code: def values(self):
      """Returns keyword-ed variable."""
      return self._values
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from abc import ABC, abstractmethod
  from xai.formatter.writer.base import Writer
label_desc: Use image node_id 4 for calling the Content obj's underlying member method code with example usage: obj.values() and returns: self