src/vs/workbench/contrib/bulkEdit/browser/bulkCellEdits.ts/ResourceNotebookCellEdit/is
class ResourceNotebookCellEdit:	static is(candidate: any): candidate is IWorkspaceNotebookCellEdit {
		if (candidate instanceof ResourceNotebookCellEdit) {
			return true;
		}
		return URI.isUri((<IWorkspaceNotebookCellEdit>candidate).resource)
			&& isObject((<IWorkspaceNotebookCellEdit>candidate).cellEdit);
	}