private void ensureFolderNumbersIsMutable() {
        if (!folderNumbers_.isModifiable()) {
          folderNumbers_ = makeMutableCopy(folderNumbers_);
        }
        bitField0_ |= 0x00000001;
      }
<pre>
Specifies a set of folders to include in the dataset
</pre>

Protobuf type {@code google.cloud.storageinsights.v1.DatasetConfig.SourceFolders}
java-storageinsights/proto-google-cloud-storageinsights-v1/src/main/java/com/google/cloud/storageinsights/v1/DatasetConfig.java