Function MaybeGetPromiseAllocationSiteFromPossiblyWrappedPromise 

pub unsafe extern "C" fn MaybeGetPromiseAllocationSiteFromPossiblyWrappedPromise(
    maybePromise: Handle<*mut JSObject>,
) -> *mut JSObject

A more flexible version of the above: Handles the cases where

1. maybePromise is wrapped
2. maybePromise is null
3. maybePromise isn’t actually a promise.

Returns js::SavedFrame if the passed argument is a wrapped promise (that’s not a dead object wrapper) and it has an allocation site.