private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.storageinsights.v1.DatasetConfig.SourceFolders,
            com.google.cloud.storageinsights.v1.DatasetConfig.SourceFolders.Builder,
            com.google.cloud.storageinsights.v1.DatasetConfig.SourceFoldersOrBuilder>
        getSourceFoldersFieldBuilder() {
      if (sourceFoldersBuilder_ == null) {
        if (!(sourceOptionsCase_ == 24)) {
          sourceOptions_ =
              com.google.cloud.storageinsights.v1.DatasetConfig.SourceFolders.getDefaultInstance();
        }
        sourceFoldersBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.storageinsights.v1.DatasetConfig.SourceFolders,
                com.google.cloud.storageinsights.v1.DatasetConfig.SourceFolders.Builder,
                com.google.cloud.storageinsights.v1.DatasetConfig.SourceFoldersOrBuilder>(
                (com.google.cloud.storageinsights.v1.DatasetConfig.SourceFolders) sourceOptions_,
                getParentForChildren(),
                isClean());
        sourceOptions_ = null;
      }
      sourceOptionsCase_ = 24;
      onChanged();
      return sourceFoldersBuilder_;
    }
<pre>
Defines the options for providing source folders for the dataset.
</pre>

<code>.google.cloud.storageinsights.v1.DatasetConfig.SourceFolders source_folders = 24;
</code>
java-storageinsights/proto-google-cloud-storageinsights-v1/src/main/java/com/google/cloud/storageinsights/v1/DatasetConfig.java