Global View Extension (vise.global.views) - specify the object type

Hi I am working on creating a global view. My component class is a Flex view which has a mediator. How does it set context object in case of GlobalView since we dont pass in any object type.

<extensionid="com.vce.vision.app">

<extendedPoint>vise.global.views</extendedPoint>

<object>

<icon>#{icon.16.block}</icon>

<name>Block</name>

<componentClassclassName="com.vce.vBlockui.views.headers.blockHeaderView"/>

</object>


</extension>