private void dumpVocabs(final Tuple3<Vocabulary, SerializerVocabulary, ParserVocabulary> vocabs) {
        LOGGER.info("""

                        vocabulary:           {}
                        serializerVocabulary: {}
                        parserVocabulary:     {}""",
                vocabs._1.characterContentChunks.size(),
                vocabs._2.characterContentChunk.size(),
                vocabs._3.characterContentChunk.getSize());
    }
A proof of concept for https://github.com/gchq/stroom/issues/1945
Trying to prove that we can generate a fast infoset vocab
for some xml and then append to it. This is to reduce the volume of data
stored in the LMDB ref data store.
stroom-pipeline/src/test/java/stroom/pipeline/refdata/TestFastInfosetVocab.java