code: public ServiceFuture<KeyBundle> recoverDeletedKeyAsync(String vaultBaseUrl, String keyName, final ServiceCallback<KeyBundle> serviceCallback) {
          return ServiceFuture.fromResponse(recoverDeletedKeyWithServiceResponseAsync(vaultBaseUrl, keyName), serviceCallback);
      }
docs: Recovers the deleted key to its latest version.
  The Recover Deleted Key operation is applicable for deleted keys in soft-delete enabled vaults. It recovers the deleted key back to its latest version under /keys. An attempt to recover an non-deleted key will return an error. Consider this the inverse of the delete operation on soft-delete enabled vaults. This operation requires the keys/recover permission.
  
  @param vaultBaseUrl The vault name, for example https://myvault.vault.azure.net.
  @param keyName The name of the deleted key.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object