code: private RendererState  findInheritFromAncestorState(SvgObject obj)
     {
        RendererState newState = new RendererState();
        updateStyle(newState, Style.getDefaultStyle());
        return findInheritFromAncestorState(obj, newState);
     }
docs: /*
  Determine an elements style based on it's ancestors in the tree rather than
  it's render time ancestors.