@Override
    public void setup(Context context) {
      cfRenameMap = createCfRenameMap(context.getConfiguration());
      filter = instantiateFilter(context.getConfiguration());
    }
@param row     The current table row key.
@param value   The columns.
@param context The current context.
@throws IOException When something is broken with the data.
hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/Import.java