src/vs/workbench/api/common/extHostNotebookDocuments.ts/ExtHostNotebookDocuments/$acceptDocumentPropertiesChanged
class ExtHostNotebookDocuments:	$acceptDocumentPropertiesChanged(uri: UriComponents, data: extHostProtocol.INotebookDocumentPropertiesChangeData): void {
		this._logService.debug('ExtHostNotebook#$acceptDocumentPropertiesChanged', uri.path, data);
		const document = this._notebooksAndEditors.getNotebookDocument(URI.revive(uri));
		document.acceptDocumentPropertiesChanged(data);
		if (data.metadata) {
			this._onDidChangeNotebookDocumentMetadata.fire({ document: document.apiNotebook });
		}
	}