code: public static <ELEMENTTYPE> boolean contains (@Nullable final ELEMENTTYPE [] aValues,
                                                  @Nullable final ELEMENTTYPE aSearchValue)
    {
      return getFirstIndex (aValues, aSearchValue) >= 0;
    }
docs: Check if the passed search value is contained in the passed value array.
  
  @param <ELEMENTTYPE>
  Array element type
  @param aValues
  The value array to be searched. May be <code>null</code>.
  @param aSearchValue
  The value to be searched. May be <code>null</code>.
  @return <code>true</code> if the value array is not empty and the search
  value is contained - false otherwise.