code: def _set_ciphers(self):
          
          ciphers = (Security.SSLCipherSuite * len(CIPHER_SUITES))(*CIPHER_SUITES)
          result = Security.SSLSetEnabledCiphers(
              self.context, ciphers, len(CIPHER_SUITES)
          )
          _assert_no_error(result)
docs: Sets up the allowed ciphers. By default this matches the set in
          util.ssl_.DEFAULT_CIPHERS, at least as supported by macOS. This is done
          custom and doesn't allow changing at this time, mostly because parsing
          OpenSSL cipher strings is going to be a freaking nightmare.