code: def lower_text(string, **unused_kwargs):
      """Lowercases text."""
      return string.lower()
  
file_path: text-to-text-transfer-transformer/t5/data/postprocessors.py
imports: import tensorflow.compat.v2
label_desc: Use image node_id 2 for calling a global function with example usage: lower_text(string) and returns: string