public static Builder newBuilder(
        com.google.cloud.vertexai.api.SharePointSources.SharePointSource prototype) {
      return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
    }
<pre>
Output only. The SharePoint file id. Output only.
</pre>

<code>string file_id = 9 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>

@return The bytes for fileId.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/SharePointSources.java