Bug 124569 [projection] expose projection model updater on JavaEditor
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
/**
		 * Creates a new delete previous sub-word action.
		 */
		public DeletePreviousSubWordAction() {
			super(ST.DELETE_WORD_PREVIOUS);
		}
		/*
		 * @see org.eclipse.jdt.internal.ui.javaeditor.JavaEditor.PreviousSubWordAction#setCaretPosition(int)
		 */
		protected void setCaretPosition(int position) {
			if (!validateEditorInputState())
				return;
			final int length;
			final ISourceViewer viewer= getSourceViewer();
			Point selection= viewer.getSelectedRange();
			if (selection.y != 0) {
				position= selection.x;
				length= selection.y;
			} else {
				length= widgetOffset2ModelOffset(viewer, viewer.getTextWidget().getCaretOffset()) - position;
			}
			try {
				viewer.getDocument().replace(position, length, ""); 
			} catch (BadLocationException exception) {