code: public static void export(Descriptor desc, PrintStream outs, String[] excludes, CFMetaData metadata) throws IOException
      {
          export(SSTableReader.open(desc), outs, excludes, metadata);
      }
docs: Export an SSTable and write the resulting JSON to a PrintStream.
  
  @param desc     the descriptor of the sstable to read from
  @param outs     PrintStream to write the output to
  @param excludes keys to exclude from export
  @param metadata Metadata to print keys in a proper format
  @throws IOException on failure to read/write input/output