class_docstr: Core Shared Embedding Column.
class_docstr_tok: ["Core","Shared","Embedding","Column","."]
docstr: get_weight_key_name.
docstr_tok: ["get_weight_key_name","."]
code: def get_weight_key_name(self):
      """get_weight_key_name."""
      if self.is_categorical_column_weighted():
          return self.categorical_column.weight_feature_key
      return None
  
imports: import math
  from tensorflow.python.feature_column import feature_column
  from tensorflow.python.feature_column import feature_column_lib
  from tensorflow.python.framework import ops
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import init_ops
  from tensorflow.python.ops import variable_scope
  from tensorflow.python.tpu import tpu
  from tensorflow.python.tpu import tpu_function
  from tensorflow.python.tpu import tpu_replication
label_desc: Use image node_id 6 for calling the _TPUSharedEmbeddingColumn obj's underlying member method code with example usage: obj.get_weight_key_name() and returns: None, self