@java.lang.Override
      public boolean hasDriveId() {
        return driveSourceCase_ == 8;
      }
<pre>
The ID of the drive to download from.
</pre>

<code>string drive_id = 8;</code>

@return Whether the driveId field is set.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/SharePointSources.java