public static Builder newBuilder(
        com.google.cloud.vertexai.api.SpeculativeDecodingSpec.DraftModelSpeculation prototype) {
      return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
    }
<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