code: def get_sequence_length_feature_key_name_from_feature_key_name(
      feature_name,
  ):
      """Gets the name of the sequence length feature from that of the base feature.
  
      Args:
        feature_name: The feature key of a sequence column.
  
      Returns:
        A string which is the feature key for the associated feature length column.
      """
      return feature_name + _SEQUENCE_FEATURE_LENGTH_POSTFIX
  
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 5 for calling a global function with example usage: get_sequence_length_feature_key_name_from_feature_key_name(feature_name) and returns: unknown