<pre class="runnable readonly text 240">
/**
* The number of ducks
* @member {Integer} duckCount_=0
*/
duckCount_: 0,

...

beforeSetDuckCount(count){
    return Math.round(count);
}
</pre>

<pre class="runnable readonly text 260">
/**
* Store holding
* @member {Store|Object} 
*/
store_: null,

...

beforeSetStore(store){
    // Utility method that returns store if it's a Store instance, or a Store if store is a config
    return ClassSystem.beforeSetInstance(store, Store); store]
}
</pre>
