code: def retrieve_import_alias_mapping(names_list):
      
      import_alias_names = dict()
  
      for alias in names_list:
          if alias.asname:
              import_alias_names[alias.asname] = alias.name
      return import_alias_names
docs: Creates a dictionary mapping aliases to their respective name.
      import_alias_names is used in module_definitions.py and visit_Call