question: public void writeExternal ( ObjectOutput out ) throws IOException { out . writeObject ( classInfos ) ; out . writeObject ( doubles ) ; out . writeObject ( instanceInfos ) ; out . writeObject ( ints ) ; out . writeObject ( raw_metadata ) ; out . writeObject ( methods ) ; out . writeObject ( namespaces ) ; out . writeObject ( namespaceSets ) ; out . writeObject ( nameData ) ; out . writeObject ( scriptInfos ) ; out . writeObject ( scriptName ) ; out . writeObject ( strings ) ; out . writeObject ( uints ) ; }
target:  Serialize the AbcData to an ObjectOutput stream.