Attachment
constructor(url: String, mimeType: String? = null, sha256: String? = null, originalSha256: String? = null, byteSize: ULong? = null, dimensions: String? = null, name: String? = null, magnet: String? = null, infohash: String? = null, blurhash: String? = null, thumbnailUrl: String? = null, imageUrl: String? = null, summary: String? = null, alt: String? = null, fallbackUrls: List<String> = emptyList(), service: String? = null, encryption: String? = null, unknownFields: List<String> = emptyList())