class_docstr: This documenter lets us removes .__call__ from the method signature for
  callable accessors like Series.plot
code: def format_name(self):
      return MethodDocumenter.format_name(self).rstrip(".__call__")
  
imports: import os
  import sys
  import sphinx
  from sphinx.util import rpartition
  from sphinx.ext.autodoc import AttributeDocumenter, Documenter, MethodDocumenter
  from sphinx.ext.autosummary import Autosummary
label_desc: Use image node_id 1 for calling the AccessorCallableDocumenter obj's underlying member method code with example usage: obj.format_name() and returns: MethodDocumenter