@java.lang.Override
    public final boolean isInitialized() {
      byte isInitialized = memoizedIsInitialized;
      if (isInitialized == 1) return true;
      if (isInitialized == 0) return false;

      memoizedIsInitialized = 1;
      return true;
    }
<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>

@param index The index of the element to return.
@return The folderNumbers at the given index.
java-storageinsights/proto-google-cloud-storageinsights-v1/src/main/java/com/google/cloud/storageinsights/v1/DatasetConfig.java