class_docstr: Specialized Documenter subclass for accessors.
code: def format_signature(self):
      # this method gives an error/warning for the accessors, therefore
      # overriding it (accessor has no arguments)
      return ""
  
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 AccessorDocumenter obj's underlying member method code with example usage: obj.format_signature() and returns: str