code: @Nonnull
    public static <ELEMENTTYPE> String getImploded (@Nullable final ELEMENTTYPE [] aElements,
                                                    @Nonnegative final int nOfs,
                                                    @Nonnegative final int nLen)
    {
      return getImplodedMapped (aElements, nOfs, nLen, String::valueOf);
    }
docs: Get a concatenated String from all elements of the passed array, without a
  separator.
  
  @param aElements
  The container to convert. May be <code>null</code> or empty.
  @param nOfs
  The offset to start from.
  @param nLen
  The number of elements to implode.
  @return The concatenated string.
  @param <ELEMENTTYPE>
  The type of elements to be imploded.