src/vs/workbench/api/common/extHostDiagnostics.ts/ExtHostDiagnostics/$acceptMarkersChange
class ExtHostDiagnostics:	$acceptMarkersChange(data: [UriComponents, IMarkerData[]][]): void {

		if (!this._mirrorCollection) {
			const name = '_generated_mirror';
			const collection = new DiagnosticCollection(name, name, ExtHostDiagnostics._maxDiagnosticsPerFile, _uri => undefined, this._fileSystemInfoService.extUri, undefined, this._onDidChangeDiagnostics);
			this._collections.set(name, collection);
			this._mirrorCollection = collection;
		}

		for (const [uri, markers] of data) {
			this._mirrorCollection.set(URI.revive(uri), markers.map(converter.Diagnostic.to));
		}
	}