docs: def imm_values(imm):
      '''
      imm_values(imm) yields a dictionary of the values of the immutable object imm. Note that this
      forces all of the values to be reified, so only use it if you want to force execution of all
      lazy values.
      '''
      return {p: getattr(imm, p) for p in six.iterkeys(_imm_value_data(imm))}