code: def simple_feat(es):
      return IdentityFeature(es["log"].ww["id"])
  
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 1 for calling a global function with example usage: simple_feat(es) and returns: IdentityFeature