public Builder mergeSpeculativeDecodingSpec(
        com.google.cloud.vertexai.api.SpeculativeDecodingSpec value) {
      if (speculativeDecodingSpecBuilder_ == null) {
        if (((bitField0_ & 0x00020000) != 0)
            && speculativeDecodingSpec_ != null
            && speculativeDecodingSpec_
                != com.google.cloud.vertexai.api.SpeculativeDecodingSpec.getDefaultInstance()) {
          getSpeculativeDecodingSpecBuilder().mergeFrom(value);
        } else {
          speculativeDecodingSpec_ = value;
        }
      } else {
        speculativeDecodingSpecBuilder_.mergeFrom(value);
      }
      if (speculativeDecodingSpec_ != null) {
        bitField0_ |= 0x00020000;
        onChanged();
      }
      return this;
    }
<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