cannot add second interaction, openlayers 3

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This is my code in Openlayers 3.9.0

I just want to pass some extra Interactions to the map after I create it. I get no errors in my console. The weird part is that I can dragRotate, this works fine, but the keyboardZoom does not work. I fail to understand why keyboardZoom fails, or how to fix this.

Thanks



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