public Collection<BlobbyStorageContainerResource> getFolders() {
    return folders;
  }
Represents a folder in a blobby storage system such as Google Drive or Microsoft OneDrive.
Can contain multiple files (via {@link DigitalDocumentWrapper}) or folders (via nested
BlobbyStorageContainerResource).
portability-types-common/src/main/java/org/datatransferproject/types/common/models/blob/BlobbyStorageContainerResource.java