code: def three_args_2_kwarg_test_fn(x1, x2, x3=None):
      x1 = ops.max(x1, axis=1)
      x2 = ops.max(x2, axis=1)
      if x3 is not None:
          x1 += ops.max(x3, axis=1)
      return x1 + x2
  
file_path: keras/keras/backend/tests/compute_output_spec_test.py
imports: import unittest
  import pytest
  from keras import backend
  from keras import ops
  from keras.backend.common.keras_tensor import KerasTensor
label_desc: Use image node_id 2 for calling a global function with example usage: three_args_2_kwarg_test_fn(x1, x2, x3) and returns: unknown