src/vs/workbench/services/decorations/browser/decorationsService.ts/DecorationsService/constructor
class DecorationsService:	constructor(
		@IUriIdentityService uriIdentityService: IUriIdentityService,
		@IThemeService themeService: IThemeService,
	) {
		this._decorationStyles = new DecorationStyles(themeService);
		this._data = TernarySearchTree.forUris(key => uriIdentityService.extUri.ignorePathCasing(key));

		this._onDidChangeDecorationsDelayed.event(event => { this._onDidChangeDecorations.fire(new FileDecorationChangeEvent(event)); });
	}