docs: def scaled_dimensions(self, width=None, height=None):
          """
          Return a (cx, cy) 2-tuple representing the native dimensions of this
          image scaled by applying the following rules to *width* and *height*.
          If both *width* and *height* are specified, the return value is
          (*width*, *height*); no scaling is performed. If only one is
          specified, it is used to compute a scaling factor that is then
          applied to the unspecified dimension, preserving the aspect ratio of
          the image. If both *width* and *height* are |None|, the native
          dimensions are returned. The native dimensions are calculated using
          the dots-per-inch (dpi) value embedded in the image, defaulting to 72
          dpi if no value is specified, as is often the case. The returned
          values are both |Length| objects.
          """
          if width is None and height is None:
              return self.width, self.height
  
          if width is None:
              scaling_factor = float(height) / float(self.height)
              width = round(self.width * scaling_factor)
  
          if height is None:
              scaling_factor = float(width) / float(self.width)
              height = round(self.height * scaling_factor)
  
          return Emu(width), Emu(height)