def contribute(self, data, context):
        if data:
            for key in self.contributes:
                context[key] = data.get(key, None)
        return context
Adds the data listed in ``contributes`` to the workflow's shared
dataset/ETHPy150Open Havate/havate-openstack/proto-build/gui/horizon/Horizon_GUI/horizon/workflows/base.py/Step.contribute