private com.google.protobuf.RepeatedFieldBuilderV3<
            com.google.cloud.vertexai.api.Content,
            com.google.cloud.vertexai.api.Content.Builder,
            com.google.cloud.vertexai.api.ContentOrBuilder>
        getContentsFieldBuilder() {
      if (contentsBuilder_ == null) {
        contentsBuilder_ =
            new com.google.protobuf.RepeatedFieldBuilderV3<
                com.google.cloud.vertexai.api.Content,
                com.google.cloud.vertexai.api.Content.Builder,
                com.google.cloud.vertexai.api.ContentOrBuilder>(
                contents_, ((bitField0_ & 0x00000008) != 0), getParentForChildren(), isClean());
        contents_ = null;
      }
      return contentsBuilder_;
    }
<pre>
Optional. Input content.
</pre>

<code>
repeated .google.cloud.vertexai.v1.Content contents = 4 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/ComputeTokensRequest.java