class_docstr: Base class for ranking networks in Keras.
class_docstr_tok: ["Base","class","for","ranking","networks","in","Keras","."]
code: def context_feature_columns(self):
      return self._context_feature_columns
  
imports: import abc
  import six
  import tensorflow.compat.v2
  from tensorflow_ranking.python import utils
  from tensorflow_ranking.python.keras import feature
label_desc: Use image node_id 2 for calling the RankingNetwork obj's underlying member method code with example usage: obj.context_feature_columns() and returns: self