Datasource with backend | How to call RessourceHandler from frondend

I want to implement a autocompletion in my QueryEditor.
The backend plugin is implementing:

I tryed calling it using:
But it seams the path is not correct.
Has someone a plugin that uses the Resource handler for autocompletion

ok got it…

the passed props object on the frondend has access to the getRessource method of the Datasource.