docs: def build(self, builder):
          """Build XML by appending to builder"""
          params = dict(SoftHard=self.soft_hard.value, Comparator=self.comparator.value)
          builder.start("RangeCheck", params)
          if self.check_value is not None:
              self.check_value.build(builder)
          if self.measurement_unit_ref is not None:
              self.measurement_unit_ref.build(builder)
          builder.end("RangeCheck")