def build_dict_to_sign(self, request, signature_headers):
        d = {}
        for header in signature_headers:
            if header == '(request-target)':
                continue
            d[header] = request.META.get(self.header_canonical(header))
        return d
process a tuple of cache-call arguments passed as an ImplValContainer
dataset/ETHPy150Open etoccalino/django-rest-framework-httpsignature/rest_framework_httpsignature/authentication.py/SignatureAuthentication.build_dict_to_sign--crossover with--dataset/ETHPy150Open ufora/ufora/ufora/FORA/python/CacheSemantics.py/CacheCallEntry.fromCacheCallTupleEntry