code: @Nonnull
    public CSSRect setLeft (@Nonnull @Nonempty final String sLeft)
    {
      ValueEnforcer.notEmpty (sLeft, "Left");
  
      m_sLeft = sLeft;
      return this;
    }
docs: Set the left coordinate.
  
  @param sLeft
  May neither be <code>null</code> nor empty.
  @return this