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What is the best practice from removing warnings when I don’t need to implement all the callback functions of a behavior ?
For instance:
Warning: undefined callback function code_change/3 (behaviour 'gen_event')
The “best” practice is actually to implement stub callbacks, with sensible return values (such as
{reply, ok, State}for calls,{noreply, State}for casts and info etc.). This will also ensure stability and compatibility if someone would ever try a code upgrade, for example, on your code.There is no way to ignore these warnings currently.