class_docstr: Subclass for testing format.
docstr: Define method to verify operation.
docstr_tok: ["Define","method","to","verify","operation","."]
code: def format(self, error):
      """Define method to verify operation."""
      return repr(error)
  
imports: from __future__ import annotations
  import argparse
  import sys
  from unittest import mock
  import pytest
  from flake8.formatting import _windows_color
  from flake8.formatting import base
  from flake8.violation import Violation
label_desc: Use image node_id 1 for calling the FormatFormatter obj's underlying member method code with example usage: obj.format(error) and returns: repr