in Diffusion/Common/Pipeline/PipelineLoader.swift [136:148]
func download() async throws -> URL {
if ready || downloaded { return downloadedURL }
let downloader = Downloader(from: url, to: downloadedURL)
self.downloader = downloader
downloadSubscriber = downloader.downloadState.sink { state in
if case .downloading(let progress) = state {
self.state = .downloading(progress)
}
}
try downloader.waitUntilDone()
return downloadedURL
}