Why can an output only have a single callback function?

[cherepanovic]

@ziczac

Thanks. That would be greatly appreciated. I like to allow users to click on charts and propagate that information to other graphs, quite often n-to-1, so keeping track of the history to determine which clickdata is updated is a bit tedious and would be extremely elegant and simple wiht multiple outputs

@chriddyp are there some updates regarding this point/feature? Thank a lot!