 @param file the file the include directives point to
	 * @param depth depth to which includes are followed, should be one of
	 * {@link #DEPTH_ZERO} or {@link #DEPTH_INFINITE}
	 * @return an array of include relations
	 * @throws CoreException
 @param file the file the include directives point to
	 * @param depth depth to which includes are followed, should be one of
	 * {@link #DEPTH_ZERO} or {@link #DEPTH_INFINITE}
	 * @return an array of include relations
	 * @throws CoreException | IIndex.java