code: def _use_multi_head():
      """Returns True if using multi-head."""
      return FLAGS.secondary_loss is not None
  
imports: from absl import flags
  import numpy
  import six
  import tensorflow
  from tensorflow import estimator
  import tensorflow_ranking
label_desc: Use image node_id 1 for calling a global function with example usage: _use_multi_head() and returns: unknown