def METHOD_NAME(self):
    # found this test silently went through without testing the header's present
    # the reason: sender=SearchView no longer match the runtime code:
    # now the signal is sent with sender=FhirDataView
    # pre_fetch.connect(self.fetching_data, sender=SearchView)
    pre_fetch.connect(self.fetching_data, sender=FhirDataView)