# shared it with the tfr_gen.py module.
    compose_dec = []
    for dec in node.decorator_list:
      if isinstance(dec, ast.Call):
        if isinstance(dec.func, ast.Attribute) and dec.func.attr == 'Composite':
          compose_dec.append(dec)
        if isinstance(dec.func, ast.Name) and dec.func.id == 'Composite':
          compose_dec.append(dec)

    if not compose_dec:
      # skip a non-composition function
      return