public Builder setExecutableCode(com.google.cloud.vertexai.api.ExecutableCode value) {
      if (executableCodeBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        data_ = value;
        onChanged();
      } else {
        executableCodeBuilder_.setMessage(value);
      }
      dataCase_ = 8;
      return this;
    }
<pre>
Optional. Code generated by the model that is meant to be executed.
</pre>

<code>
.google.cloud.vertexai.v1.ExecutableCode executable_code = 8 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/Part.java