<f:layout name="Default" />

<f:section name="Main">
Overridden Default template.
Value of "foobar": {foobar}.

Rendering of partial, original:
<f:render partial="FirstPartial" arguments="{baz: foobar}" />

Rendering of partial, overridden:
<f:render partial="SecondPartial" arguments="{baz: foobar}" />
</f:section>