code: public boolean containsValue(Token value,
                                   Transaction transaction)
                      throws ObjectManagerException
      {
          try {
              for (Iterator iterator = entrySet().iterator();;) {
                  Entry entry = (Entry) iterator.next(transaction);
                  Token entryValue = entry.getValue();
                  if (value == entryValue) {
                      return true;
                  }
              }
          } catch (java.util.NoSuchElementException exception) {
              // No FFDC code needed, just exited search.
              return false;
          } // try.
  
      }
docs: Determines if the Map contains the Token
  
  @param Token whose presence in this map is to be tested.
  @param Transaction which determines visibility of Entries in the Map.
  
  @return Boolean <tt>true</tt> if the map contains at least one mapping to the Token visible to the Transaction.
  @exception ObjectManagerException.