public com.google.protobuf.ByteString getIdBytes() {
      java.lang.Object ref = id_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        id_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<pre>
Immutable. The ID of the DeployedModel. If not provided upon deployment,
Vertex AI will generate a value for this ID.

This value should be 1-10 characters, and valid characters are `/[0-9]/`.
</pre>

<code>string id = 1 [(.google.api.field_behavior) = IMMUTABLE];</code>

@return The bytes for id.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/DeployedModel.java