OptionalboldOptionalcolorOptionalfontOptionalfontOptionalfromOptionalhOptionalnameImage file name, or the html widget's Title.
OptionalpointsOptionalshapeOptionaltagThe item's role tag, when set (see WhiteboardItemBase.Tag).
OptionaltextClipped text content (sticky/text/shape labels; markdown/html: clipped SOURCE).
OptionaltoOptionalwOptionalxOptionaly
Compact, model-facing representation of one item inside deltas / summaries.