docs: def objectsFromPEM(pemdata):
      """
      Load some objects from a PEM.
      """
      certificates = []
      keys = []
      blobs = [b""]
      for line in pemdata.split(b"\n"):
          if line.startswith(b'-----BEGIN'):
              if b'CERTIFICATE' in line:
                  blobs = certificates
              else:
                  blobs = keys
              blobs.append(b'')
          blobs[-1] += line
          blobs[-1] += b'\n'
      keys = [KeyPair.load(key, FILETYPE_PEM) for key in keys]
      certificates = [Certificate.loadPEM(certificate)
                      for certificate in certificates]
      return PEMObjects(keys=keys, certificates=certificates)