src/vs/css.build.ts/write
export function write(pluginName: string, moduleName: string, write: AMDLoader.IPluginWriteCallback): void {
	const entryPoint = write.getEntryPoint();

	entryPoints[entryPoint] = entryPoints[entryPoint] || [];
	entryPoints[entryPoint].push({
		moduleName: moduleName,
		contents: contentsMap[moduleName],
		fsPath: pathMap[moduleName],
	});

	write.asModule(pluginName + '!' + moduleName,
		'define([\'vs/css!' + entryPoint + '\'], {});'
	);
}