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It seems that the repeated checks for
if (attachBreadcrumbs)
can be extracted out of the observable creation. As far as I can tell, ifattachBreadcrumb
is not set, the newObservable
does nothing except to forward all calls to theoriginalObserver
. So one can instead just have an earlyreturn forward(operation);
.This obviates the need for the dull (and repetitive) type assertions of
breadcrumb as GraphQLBreadcrumb
with the// We must have a breadcrumb if attachBreadcrumbs was set
justification.