code: @Override
      public boolean contains(Object arg0) {
          checkUnsupportedOperationForIterationOnlyMode("contains(Object arg0)");
          
          if ( allResults.contains(arg0) )
              return true;
          
          while ( nextResultsAvailable() ) {
              boolean found = nextResults.contains(arg0);
              moveNextResults(false);
              if ( found )
                  return true;
          }
  
          return false;
      }
docs: Returns whether the collection contains the given element. Results are
  loaded and checked incrementally until a match is found or the end of the
  result set is reached.
  <p>
  Not supported in ITERATION_ONLY mode.
  </p>