code: public ServiceFuture<Void> purgeDeletedAsync(String vaultName, String location, final ServiceCallback<Void> serviceCallback) {
          return ServiceFuture.fromResponse(purgeDeletedWithServiceResponseAsync(vaultName, location), serviceCallback);
      }
docs: Permanently deletes the specified vault. aka Purges the deleted Azure key vault.
  
  @param vaultName The name of the soft-deleted vault.
  @param location The location of the soft-deleted vault.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object