class World(pub name: String, pub color: String)
    pub static worlds = [
        World('Mercury', 'Red'),
        World('Earth', 'Blue'),
        World('Jupiter', 'Orange')
    ]

    pub static getWorld(color: String) -> String = worlds
        .find { it.color == color }
        .map { it.name }
        .expect "No world has the given color ${color}."
end

fn main()
    println "Hello, ${World::getWorld('Blue')}!"
end