code: def float_equal(a, b, rel_tol=1e-09, abs_tol=0.0):
      return abs(a - b) <= max(rel_tol * max(abs(a), abs(b)), abs_tol)
  
imports: import decimal
  import logging
  import unittest
  from pyflink.fn_execution.coders import BigIntCoder, TinyIntCoder, BooleanCoder, SmallIntCoder, IntCoder, FloatCoder, DoubleCoder, BinaryCoder, CharCoder, DateCoder, TimeCoder, TimestampCoder, GenericArrayCoder, MapCoder, DecimalCoder, FlattenRowCoder, RowCoder, LocalZonedTimestampCoder, BigDecimalCoder, TupleCoder, PrimitiveArrayCoder, TimeWindowCoder, CountWindowCoder, InstantCoder
  from pyflink.datastream.window import TimeWindow, CountWindow
  from pyflink.testing.test_case_utils import PyFlinkTestCase
label_desc: Use image node_id 2 for calling the CodersTest obj's underlying member method code with example usage: obj.float_equal(a, b, rel_tol, abs_tol) and returns: unknown