code: def approx_equal(
      col1: Column, col2: Column, threshold: Number
  ) -> Column:
      """Compare two ``Column`` objects by checking if the difference between them is less than a specified ``threshold``.
  
      :param col1: the first ``Column``
      :type col1: Column
      :param col2: the second ``Column``
      :type col2: Column
      :param threshold: value to compare with
      :type threshold: Number
      :return: Boolean ``Column`` with ``True`` indicating that ``abs(col1 -
      col2)`` is less than ``threshold``
      """
      return F.abs(col1 - col2) < threshold
  
imports: from __future__ import annotations
  from typing import TYPE_CHECKING
  import re
  import uuid
  from typing import Any
  import pyspark.sql.functions
  from pyspark.sql.types import ArrayType, BooleanType, StringType
label_desc: Use image node_id 11 for calling a global function with example usage: approx_equal(col1, col2, threshold) and returns: unknown