public Builder clearSpeculativeDecodingSpec() {
      bitField0_ = (bitField0_ & ~0x00020000);
      speculativeDecodingSpec_ = null;
      if (speculativeDecodingSpecBuilder_ != null) {
        speculativeDecodingSpecBuilder_.dispose();
        speculativeDecodingSpecBuilder_ = null;
      }
      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