code: @Nullable
    public static CSSRect getAsRect (@Nullable final String sCSSValue)
    {
      final String [] aValues = getRectValues (sCSSValue);
      return aValues == null ? null : new CSSRect (aValues[0], aValues[1], aValues[2], aValues[3]);
    }
docs: Interpret the passed value as a CSS rectangle and convert it to a
  {@link CSSRect}.
  
  @param sCSSValue
  The CSS values to check. May be <code>null</code>.
  @return <code>null</code> if the passed String is not a CSS rectangle.