public void serializeValue(RandomAccessOutput byteStream, Object obj, ObjectInspector objInspector,
        boolean skipLengthPrefix, BooleanRef warnedOnceNullMapKey) {
      if (obj != null) {
        serialize(byteStream, obj, objInspector, skipLengthPrefix, warnedOnceNullMapKey);
      }
    }
Abstract serializer class for serializing to LazyBinary format.
serde/src/java/org/apache/hadoop/hive/serde2/lazybinary/LazyBinarySerDe2.java