Enum for specifying event types for which notifications are
to be published.
Additional event types may be added in the future. Clients
should either safely ignore unrecognized event types or
explicitly specify which event types they are prepared to
accept.
Values:
EVENT_TYPE_UNSPECIFIED (0):
Illegal value, to avoid allowing a default.
TRANSFER_OPERATION_SUCCESS (1):
TransferOperation completed with status
SUCCESS][google.storagetransfer.v1.TransferOperation.Status.SUCCESS].
TRANSFER_OPERATION_FAILED (2):
TransferOperation completed with status
FAILED][google.storagetransfer.v1.TransferOperation.Status.FAILED].
TRANSFER_OPERATION_ABORTED (3):
TransferOperation completed with status
ABORTED][google.storagetransfer.v1.TransferOperation.Status.ABORTED].