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sclass Meta implements IMeta {
// We allocate one extra field for each Java object to make it
// reasoning-compatible. We couldn't go for 0 extra fields and
// there are no half fields in Java... so there you go.
// Also, if you don't use any meta data, you are probably not
// reasoning about anything. The point of reasoning in JavaX is
// to attach information to objects directly used in the program.
// So here it is. The field.
// We also have IMeta to retrofit foreign classes (rare but
// probably useful)
// generic meta value of any kind (e.g. Map with extra field values)
// volatile to avoid synchronization
volatile O meta;
// ...and the interface methods
public void _setMeta(O meta) { this.meta = meta; }
public O _getMeta() { ret meta; }
}