code: @Nonnull
    @ReturnsMutableCopy
    public static HasInputStream multiple (@Nonnull final ISupplier <? extends InputStream> aISP)
    {
      return new HasInputStream (aISP, true);
    }
docs: Create a new object with a supplier that can read multiple times.
  
  @param aISP
  {@link InputStream} provider. May not be <code>null</code>.
  @return Never <code>null</code>.