handler = (chunk, set) => {
					if (onceForChunkSet.has(chunk)) return;
					onceForChunkSet.add(chunk);
					if (!isEnabledForChunk(chunk)) return;

					set.add(RuntimeGlobals.makeNamespaceObject);

					const CssLoadingRuntimeModule = getCssLoadingRuntimeModule();
					compilation.addRuntimeModule(chunk, new CssLoadingRuntimeModule(set));
				}
@param {Chunk} chunk chunk to check
@param {Set<string>} set runtime requirements