public java.util.List<java.lang.Long> getFolderNumbersList() {
        folderNumbers_.makeImmutable();
        return folderNumbers_;
      }
<pre>
Optional. The list of folder numbers to include in the dataset.
</pre>

<code>repeated int64 folder_numbers = 1 [(.google.api.field_behavior) = OPTIONAL];</code>

@return A list containing the folderNumbers.
java-storageinsights/proto-google-cloud-storageinsights-v1/src/main/java/com/google/cloud/storageinsights/v1/DatasetConfig.java