@java.lang.Override
    public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(draftModel_)) {
        com.google.protobuf.GeneratedMessageV3.writeString(output, 1, draftModel_);
      }
      getUnknownFields().writeTo(output);
    }
<pre>
Required. The resource name of the draft model.
</pre>

<code>
string draft_model = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
</code>

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