Method getModulePostOrderIndex

lib/ChunkGroup.js:665–667

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

(module)

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

	/* istanbul ignore next */
	checkConstraints() {