src/vs/workbench/contrib/customEditor/browser/customEditorInput.ts/CustomEditorInput/shortDescription
class CustomEditorInput:	private get shortDescription(): string {
		if (typeof this._shortDescription !== 'string') {
			this._shortDescription = this.labelService.getUriBasenameLabel(dirname(this.resource));
		}

		return this._shortDescription;
	}