src/vs/workbench/api/common/extHostTypes.ts/WorkspaceEdit/replaceNotebookMetadata
class WorkspaceEdit:	replaceNotebookMetadata(uri: URI, value: Record<string, any>, metadata?: vscode.WorkspaceEditEntryMetadata): void {
		this._edits.push({ _type: FileEditType.Cell, metadata, uri, edit: { editType: CellEditType.DocumentMetadata, metadata: value }, notebookMetadata: value });
	}