docs: def parse(cls, backend, ik, spk, spk_signature, otpks):
          """
          Use this method when creating a bundle from data you retrieved directly from some
          PEP node. This method applies an additional decoding step to the public keys in
          the bundle. Pass the same structure as the constructor expects.
          """
  
          ik = backend.decodePublicKey(ik)[0]
  
          spk["key"] = backend.decodePublicKey(spk["key"])[0]
  
          otpks = list(map(lambda otpk: {
              "key" : backend.decodePublicKey(otpk["key"])[0],
              "id"  : otpk["id"]
          }, otpks))
  
          return cls(ik, spk, spk_signature, otpks)