public com.google.cloud.vertexai.api.SpeculativeDecodingSpecOrBuilder
        getSpeculativeDecodingSpecOrBuilder() {
      if (speculativeDecodingSpecBuilder_ != null) {
        return speculativeDecodingSpecBuilder_.getMessageOrBuilder();
      } else {
        return speculativeDecodingSpec_ == null
            ? com.google.cloud.vertexai.api.SpeculativeDecodingSpec.getDefaultInstance()
            : speculativeDecodingSpec_;
      }
    }
<pre>
Optional. Spec for configuring speculative decoding.
</pre>

<code>
.google.cloud.vertexai.v1.SpeculativeDecodingSpec speculative_decoding_spec = 30 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/DeployedModel.java