code: @Nonnull
    public CSSExpression addTermSimple (@Nonnull @Nonempty final String sValue)
    {
      return addMember (new CSSExpressionMemberTermSimple (sValue));
    }
docs: Shortcut method to add a simple text value.
  
  @param sValue
  The value to be added. May neither be <code>null</code> nor empty.
  @return this