@Override
	public void actionPerformed(ActionContext actionContext) {
		ListingActionContext context = (ListingActionContext) actionContext.getContextObject();
		createDataType(context);
	}
An action that allows the user to change or select a data type.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/function/ChooseDataTypeAction.java