sleepUntilElement method
Alias to testUISleepUntilElement.
Implementation
Future<T> sleepUntilElement(String selectors,
        {Element? root,
        int? timeoutMs,
        int? intervalMs,
        int? minMs,
        Iterable<Element> Function(List<Element> elems)? mapper,
        bool Function(List<Element> elems)? validator,
        bool expected = false}) =>
    testUISleepUntilElement(root ?? element, selectors,
            timeoutMs: timeoutMs,
            intervalMs: intervalMs,
            minMs: minMs,
            mapper: mapper,
            validator: validator,
            expected: expected)
        .thenChain((_) => this as T);