code: def test_convert_6_channels_to_rgb(
      self, input_shape, expected_output_shape
  ):
      channels = [np.random.random(input_shape) for _ in range(6)]
      rgb = vis.convert_6_channels_to_rgb(channels)
      self.assertEqual(rgb.shape, expected_output_shape)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import glob
  import os
  from absl.testing import absltest
  from absl.testing import parameterized
  import numpy
  from third_party.nucleus.protos import variants_pb2
  from third_party.nucleus.testing import test_utils
  from third_party.nucleus.util import vis
  from tensorflow.core.example import example_pb2
  from tensorflow.core.example import feature_pb2
label_desc: Use image node_id 4 for calling the VisTest obj's underlying member method code with example usage: obj.test_convert_6_channels_to_rgb(input_shape, expected_output_shape) without return types