Method getModulePreOrderIndex

lib/ChunkGroup.js:646–648

* Returns the module's top-down traversal index within this group. * @param {Module} module the module * @returns {number | undefined} index

(module)

	 * @returns {number | undefined} index
	 */
	getModulePreOrderIndex(module) {
		return this._modulePreOrderIndices.get(module);
	}

	/**
	 * Stores the module's bottom-up traversal index within this group.