[TYPO3-mvc] clearing fluids cache

[Christian Zenker]

Hi.

I got some trouble when changing signatures of my custom ViewHelpers.  
Moving arguments from render() to initializeArguments() and vice versa  
throws an exception when rendering the template:

Argument "src" was not registered.

How can fluids cache be cleared? Or is there any way to force fluid to  
re-parse the ViewHelper and his signature?

Christian.