public void putToAttributes(java.nio.ByteBuffer key, java.nio.ByteBuffer val) {
      if (this.attributes == null) {
        this.attributes = new java.util.HashMap<java.nio.ByteBuffer,java.nio.ByteBuffer>();
      }
      this.attributes.put(key, val);
    }
Returns true if field column is set (has been assigned a value) and false otherwise
hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/generated/Hbase.java