fn clear(view: MutSpan<Maybe<u8>>) -> Void {
    view[0] = null
}

pub fn main() -> Void {
    let input: [1]u8 = [1]
    var values: [1]Maybe<u8> = [std.mem.get(input, 0)]
    let view: MutSpan<Maybe<u8>> = values
    if values[0].has {
        clear(view)
        let byte: u8 = values[0].value
    }
}