code: public Envelope getEnvelope(String accountId, String envelopeId) throws ApiException {
      return getEnvelope(accountId, envelopeId, null);
    }
docs: Gets the status of a envelope.
  Retrieves the overall status for the specified envelope.
  @param accountId The external account number (int) or account ID Guid. (required)
  @param envelopeId The envelopeId Guid of the envelope being accessed. (required)
  @return Envelope