class_docstr: Finds the longest form of variable names and their imports in code
  
  Only retains names from imported modules.
code: def visit_Name(self, node):
      self.accessed_names.add(node.id)
  
file_path: tensorly/doc/sphinx_ext/sphinx_gallery/backreferences.py
imports: from __future__ import print_function
  import ast
  import os
label_desc: Use image node_id 4 for calling the NameFinder obj's underlying member method code with example usage: obj.visit_Name(node) without return types