code: def _query_count(self) -> int:
      return len(self._data)
  
imports: from __future__ import annotations
  import typing
  import pytest
  from flask import Flask
  from werkzeug.exceptions import NotFound
  from flask_sqlalchemy import SQLAlchemy
  from flask_sqlalchemy.pagination import Pagination
label_desc: Use image node_id 3 for calling the RangePagination obj's underlying member method code with example usage: obj._query_count() and returns: len