public Builder mergePromptFeedback(
        com.google.cloud.vertexai.api.GenerateContentResponse.PromptFeedback value) {
      if (promptFeedbackBuilder_ == null) {
        if (((bitField0_ & 0x00000010) != 0)
            && promptFeedback_ != null
            && promptFeedback_
                != com.google.cloud.vertexai.api.GenerateContentResponse.PromptFeedback
                    .getDefaultInstance()) {
          getPromptFeedbackBuilder().mergeFrom(value);
        } else {
          promptFeedback_ = value;
        }
      } else {
        promptFeedbackBuilder_.mergeFrom(value);
      }
      if (promptFeedback_ != null) {
        bitField0_ |= 0x00000010;
        onChanged();
      }
      return this;
    }
<pre>
Output only. Content filter results for a prompt sent in the request.
Note: Sent only in the first stream chunk.
Only happens when no candidates were generated due to content violations.
</pre>

<code>
.google.cloud.vertexai.v1.GenerateContentResponse.PromptFeedback prompt_feedback = 3 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/GenerateContentResponse.java