What is @iswrapper decorator from ibapi.utils?

Question

As the title suggests, what does @iswrapper decorator do? I see it quite often in the official docs, but can't find any explanation of it.

Answer 1

Just look at the source

# I use this just to visually emphasize it's a wrapper overriden method
def iswrapper(fn):
    return fn

It's convenient when your class is mixed up with some EWrapper methods.