re. */</PRE>
<PRE>/* The topmost interaction. It groups the two large interactions vertically. */
@object GenInteractionClass TopInteraction = {
    GI_comp = @ParaInteraction, @ReplyInteraction;
    HINT_ORIENT_CHILDREN_VERTICALLY;
}</PRE>
<PRE>/* The top of the two large interactions. It groups the three smaller interactions
 * on the top, horizontally. */
@object GenInteractionClass ParaInteraction = {
    GI_comp = @FontInteraction, @JustInteraction, @StyleInteraction;
    HINT_ORIENT_CHILDREN_HORIZONTA