[GitHub] flink issue #3748: [FLINK-6225] [Cassandra Connector] add CassandraTableSink

[zentol]

Github user zentol commented on the issue:

    https://github.com/apache/flink/pull/3748
  
    ```
    [ERROR] 
src/main/java/org/apache/flink/streaming/connectors/cassandra/CassandraRowSink.java:[20,8]
 (imports) UnusedImports: Unused import: 
org.apache.flink.configuration.Configuration.
    [ERROR] 
src/main/java/org/apache/flink/streaming/connectors/cassandra/CassandraRowSink.java:[23,8]
 (imports) UnusedImports: Unused import: 
com.datastax.driver.core.PreparedStatement.
    [ERROR] 
src/main/java/org/apache/flink/streaming/connectors/cassandra/CassandraRowSink.java:[24,8]
 (imports) UnusedImports: Unused import: com.datastax.driver.core.ResultSet.
    [ERROR] 
src/main/java/org/apache/flink/streaming/connectors/cassandra/CassandraRowSink.java:[25,8]
 (imports) UnusedImports: Unused import: 
com.google.common.util.concurrent.ListenableFuture.
    ```


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