code: async def revoke(self, schemaId: ID, i):
          
          acc, ts = await self._nonRevocationIssuer.revoke(schemaId, i)
          await self.wallet.submitAccumUpdate(schemaId=schemaId, accum=acc,
                                              timestampMs=ts)
docs: Performs revocation of a Claim.
  
          :param schemaId: The schema ID (reference to claim
          definition schema)
          :param i: claim's sequence number within accumulator