@java.lang.Override
      public int getPromptTokenCount() {
        return promptTokenCount_;
      }
<pre>
Number of tokens in the request. When `cached_content` is set, this is
still the total effective prompt size meaning this includes the number of
tokens in the cached content.
</pre>

<code>int32 prompt_token_count = 1;</code>

@return The promptTokenCount.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/GenerateContentResponse.java