@Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        ValueStoreMeta that = (ValueStoreMeta) o;
        return typeId == that.typeId &&
                referenceCount == that.referenceCount;
    }
< typeId >< referenceCount >
< 1 byte >< 3 bytes >
<p>
referenceCount stored as a 3 byte unsigned integer so a max
of ~16 million.
stroom-pipeline/src/main/java/stroom/pipeline/refdata/store/offheapstore/ValueStoreMeta.java