src/vs/workbench/contrib/files/browser/views/explorerDecorationsProvider.ts/ExplorerDecorationsProvider/constructor
class ExplorerDecorationsProvider:	constructor(
		@IExplorerService private explorerService: IExplorerService,
		@IWorkspaceContextService contextService: IWorkspaceContextService
	) {
		this.toDispose.add(this._onDidChange);
		this.toDispose.add(contextService.onDidChangeWorkspaceFolders(e => {
			this._onDidChange.fire(e.changed.concat(e.added).map(wf => wf.uri));
		}));
		this.toDispose.add(explorerRootErrorEmitter.event((resource => {
			this._onDidChange.fire([resource]);
		})));
	}