For details on supported `google.longrunning` methods, see the
[RPC](https://docs.cloud.google.com/speech-to-text/docs/reference/rpc/google.longrunning.md.txt)
and
[REST](https://docs.cloud.google.com/speech-to-text/docs/reference/rest/v2/projects.locations.operations.md.txt)
documentation.

## ListOperations

To return V2 operations:

- The RPC `Operations.ListOperations`
  [method](https://docs.cloud.google.com/speech-to-text/docs/reference/rpc/google.longrunning.md.txt#google.longrunning.ListOperationsRequest)
  must be called with the `name` field set to
  `projects/<project>/locations/<speech location>`, with bracketed terms
  indicating variable text.

- The `filter` field must be set to `is_v2(name)` (literally, including
  parentheses).

## Operation ID

All Cloud Speech-to-Text V2 operations have a `unique_id` in the `name` [field](https://docs.cloud.google.com/speech-to-text/docs/reference/rpc/google.longrunning.md.txt#operation) that starts with `v2-`.
This makes it possible to discern between Cloud Speech-to-Text
V2 and V1 operations.