code: def test_description_custom_caption(trans_feat):
      custom_description = "A custom feature description"
      custom_description_graph = graph_feature(
          trans_feat,
          description=custom_description,
      ).source
      custom_description_label = 'label="A custom feature description"'
      assert custom_description_label in custom_description_graph
  
imports: import json
  import os
  import re
  import graphviz
  import pytest
  from featuretools.feature_base import AggregationFeature, DirectFeature, FeatureOutputSlice, GroupByTransformFeature, IdentityFeature, TransformFeature, graph_feature
  from featuretools.primitives import Count, CumMax, Mode, NMostCommon, Year
label_desc: Use image node_id 17 for calling a global function with example usage: test_description_custom_caption(trans_feat) without return types