code: boolean isLookupNeeded(Set<TraceeBackendProvider> classLoaderProviders) {
  		return classLoaderProviders == null || !(classLoaderProviders instanceof EmptyBackendProviderSet) && classLoaderProviders.isEmpty();
  	}
docs: /*
  Helper method for #getTraceeProviderFromClassloader
  We do a lookup / return true if result is null and when the result is not an instance of EmptyBackendProviderSet and empty.
  In the last case the garbage collector kicked out our resolvers and we've to recreate them