private void ensureMeanAttributionsIsMutable() {
      if (!((bitField0_ & 0x00000001) != 0)) {
        meanAttributions_ =
            new java.util.ArrayList<com.google.cloud.vertexai.api.Attribution>(meanAttributions_);
        bitField0_ |= 0x00000001;
      }
    }
<pre>
Aggregated explanation metrics for a Model over a set of instances.
</pre>

Protobuf type {@code google.cloud.vertexai.v1.ModelExplanation}
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/ModelExplanation.java