AIP-203: is IDENTIFIER + OUTPUT_ONLY a valid combination

[CuriousStork]

Hello,

I wonder if a name field with IDENTIFIER + OUTPUT_ONLY behavior is valid.

On the one hand OUTPUT_ONLY states the following in AIP-203:

the server must clear out any value in this field and must not throw an error as a result of the presence of a value in this field on input

So methods like standard Update/Delete won't work, because the server must clear out the name value which identifies the resource to be updated.

On the other hand, I see at least one IDENTIFIER + OUTPUT_ONLY precedent of in googleapis: https://github.com/googleapis/googleapis/blob/7659dd2244563fd902b681bdcadbe5385b8d3462/google/cloud/recaptchaenterprise/v1/recaptchaenterprise.proto#L605

  // Output only. Identifier. The resource name for the Assessment in the format
  // `projects/{project}/assessments/{assessment}`.
  string name = 1 [
    (google.api.field_behavior) = OUTPUT_ONLY,
    (google.api.field_behavior) = IDENTIFIER
  ];