function updateSelection(editorState, selection, forceSelection) {
	  return EditorState.set(editorState, {
	    selection: selection,
	    forceSelection: forceSelection,
	    nativelyRenderedContent: null,
	    inlineStyleOverride: null
	  });
	}
Regenerate the entire tree map for a given ContentState and decorator.
Returns an OrderedMap that maps all available ContentBlock objects.