I work on a React Native app using redux-observable. I have 10+ epics, all ending with `.catch(err => console.error(err))` in order to display the React Native "Red box" (see <https://facebook.github.io/react-native/docs/debugging.html#errors>) in case of errors inside the epic.

How can I define a global error handler instead, used by all epics (they are combined later by the `combineEpics` function) ?