let package = Package(
    name: "XXX",
    products: [
        .library(
            name: "XXX",
            targets: ["XXX"]),
    ],
    dependencies: [
        .package(url: "https://github.com/Digipolitan/polymorph-core.git", from: "1.1.0")
    ],
    targets: [
        .target(
            name: "XXX",
            dependencies: ["PolymorphCore"])
    ]
)

guard let package = try? Package(string: "com.digipolitan.sample"),
      let userPackage = try? Package(string: "user") else {
    return
}
let project = Project(name: "Sample", package: package)
project.models.addClass(.init(name: "User", package: userPackage))

let encoder = JSONEncoder()
if let data = try? encoder.encode(project),
    let json = String(data: data, encoding: .utf8) {
    print(json) // Print project as JSON
}