code: def effective_value(self):
          
          raw_value = self.actual
          if raw_value is None:
              raw_value = self.def_val
          return self._normalize(raw_value)
docs: Read/write |float| representing normalized adjustment value for this
          adjustment. Actual values are a large-ish integer expressed in shape
          coordinates, nominally between 0 and 100,000. The effective value is
          normalized to a corresponding value nominally between 0.0 and 1.0.
          Intuitively this represents the proportion of the width or height of
          the shape at which the adjustment value is located from its starting
          point. For simple shapes such as a rounded rectangle, this intuitive
          correspondence holds. For more complicated shapes and at more extreme
          shape proportions (e.g. width is much greater than height), the value
          can become negative or greater than 1.0.