src/vs/workbench/contrib/output/common/outputChannelModelService.ts/OutputChannelModelService/outputDir
class OutputChannelModelService:	private get outputDir(): Promise<URI> {
		if (!this._outputDir) {
			this._outputDir = this.fileService.createFolder(this.outputLocation).then(() => this.outputLocation);
		}
		return this._outputDir;
	}