private void notifyEditingChanged() {
		for (CompositeEditorModelListener listener : listeners) {
			listener.compositeEditStateChanged(
				isEditingField() ? CompositeEditorModelListener.EDIT_STARTED
						: CompositeEditorModelListener.EDIT_ENDED);
		}
	}
Returns whether or not the editor is showing undefined bytes.
 @return true if the editor is showing undefined bytes.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/compositeeditor/CompositeEditorModel.java