interface MysqlRow implements Countable, IteratorAggregate<mixed>, HH\KeyedTraversable<string, mixed> {...}
->at(mixed $field): ?mixed
->count(): int
->fieldType(mixed $field): int
->getFieldAsDouble(mixed $field): float
->getFieldAsInt(mixed $field): int
->getFieldAsString(mixed $field): string
->getIterator(): KeyedIterator<string, mixed>
->isNull(mixed $field): bool