SVGTransformList WebIDL

Should the following change be made to the WebIDL for SVGTransformList?

-  SVGTransform consolidate();
+  SVGTransform? consolidate();

The spec says consolidate returns "The resulting SVGTransform object which
becomes single item in the list. If the list was empty, then a value of
null is returned. "

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Best Regards,
David Zbarsky