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