code: protected void setClosed()
     {
        if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) SibTr.entry(this, tc, "setClosed");
        closed = true;
        if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) SibTr.exit(this, tc, "setClosed");
     }
docs: Marks this proxy object as being closed.