presto-kafka/src/main/java/io/prestosql/plugin/kafka/KafkaHandleResolver.java/KafkaHandleResolver/convertColumnHandle
class KafkaHandleResolver:    static KafkaColumnHandle convertColumnHandle(ColumnHandle columnHandle)
    {
        requireNonNull(columnHandle, "columnHandle is null");
        checkArgument(columnHandle instanceof KafkaColumnHandle, "columnHandle is not an instance of KafkaColumnHandle");
        return (KafkaColumnHandle) columnHandle;
    }