docs: def origin_mexico(origin):
      """\
      Returns if the origin is Mexico.
  
      `origin`
          The origin to check.
      """
      return origin in (u'CIUDADJUAREZ', u'GUADALAJARA', u'HERMOSILLO',
                        u'MATAMOROS', u'MERIDA', u'MEXICO', u'MONTERREY',
                        u'NOGALES',
                        u'NUEVOLAREDO', u'TIJUANA')