code: public synchronized boolean contains(int id)
     {
        if (tc.isEntryEnabled()) SibTr.entry(this, tc, "contains", ""+id);
        mutableKey.setValue(id);
        boolean returnValue = idToConvTable.containsKey(mutableKey); 
        if (tc.isEntryEnabled()) SibTr.exit(this, tc, "contains", ""+returnValue);
        return returnValue;
     }
docs: Test to determine if a particular conversation ID is present in the table.
  @param id
  @return boolean