pseudo-syntax for pushing a pre-declared instance onto a property

FSM.mxml

<?xml version="1.0"?>
<fsm:FSMDeclaration
    xmlns:fx="http://ns.adobe.com/mxml/2009"
    xmlns:fsm="fsm.*"
    initial="{s1}">

    <fsm:states>
        <fsm:State id="s1">
           <fsm:Transition ref="{t1}"/>
        </fsm:State>
        <fsm:State id="s2"/>
    </fsm:states>

    <fsm:transitions>
        <fsm:Transition id="t1" target="{s2}"/>
    </fsm:transitions>

</fsm:FSMDeclaration>