Flex 4.6 hostComponent no longer Works? - actionscript-3

Question

hostComponent seems to have stopped working as it used to before. If I create a custom comp based on lets say SkinnableContainer and apply default skin I am unable to see co hinting for Bindable/public variables from the skin. Code below to illustrate.
What am I missing here? Same seems to happen with other components/skins. I'm using latest Flash Builder (4.6).
<--------- Component --------------->
<?xml version="1.0" encoding="utf-8"?>
<s:SkinnableContainer xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
width="400" height="300" skinClass="skins.testSkin">
<fx:Declarations>
<!-- Place non-visual elements (e.g., services, value objects) here -->
</fx:Declarations>
<fx:Script>
<![CDATA[
[Bindable]
public var test:String = "Test";
]]>
</fx:Script>
</s:SkinnableContainer>
<----------------- Skin -------------->
<?xml version="1.0" encoding="utf-8"?>
<s:Skin xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:fb="http://ns.adobe.com/flashbuilder/2009" alpha.disabled="0.5">
<fx:Metadata>
<![CDATA[
/**
* #copy spark.skins.spark.ApplicationSkin#hostComponent
*/
[HostComponent("spark.components.SkinnableContainer")]
]]>
</fx:Metadata>
<fx:Script fb:purpose="styling">
<![CDATA[
/**
* #private
*/
override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number) : void
{
this.hostComponent
// Push backgroundColor and backgroundAlpha directly.
// Handle undefined backgroundColor by hiding the background object.
if (isNaN(getStyle("backgroundColor")))
{
background.visible = false;
}
else
{
background.visible = true;
bgFill.color = getStyle("backgroundColor");
bgFill.alpha = getStyle("backgroundAlpha");
}
super.updateDisplayList(unscaledWidth, unscaledHeight);
}
]]>
</fx:Script>
<s:states>
<s:State name="normal" />
<s:State name="disabled" />
</s:states>
<!--- Defines the appearance of the SkinnableContainer class's background. -->
<s:Rect id="background" left="0" right="0" top="0" bottom="0">
<s:fill>
<!--- #private -->
<s:SolidColor id="bgFill" color="#FFFFFF"/>
</s:fill>
</s:Rect>
<!--
Note: setting the minimum size to 0 here so that changes to the host component's
size will not be thwarted by this skin part's minimum size. This is a compromise,
more about it here: http://bugs.adobe.com/jira/browse/SDK-21143
-->
<!--- #copy spark.components.SkinnableContainer#contentGroup -->
<s:Group id="contentGroup" left="0" right="0" top="0" bottom="0" minWidth="0" minHeight="0">
<s:layout>
<s:BasicLayout/>
</s:layout>
</s:Group>
</s:Skin>

Answer 1

In order for Flash Builder to be able to provide you with code hinting for the public methods and properties of a custom component, the custom component needs to be specified in the HostComponent metadata directive within the skin. Currently, the skin code you provided has:
[HostComponent("spark.components.SkinnableContainer")]
Try changing that to whatever your custom component is, eg. com.mydomain.MyComponent.