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 private static func scanForDRM(in container: Container) -> DRM? {  
  /// LCP.
  // Check if a LCP license file is present in the container.
  if ((try? container.data(relativePath: EPUBConstant.lcplFilePath)) != nil) {
     return DRM(brand: .lcp)
   }
   return DRM(brand: .adobe)
   // return nil
  }