interface Context {
    str() string
}

struct OtherContext {
    a string
}

pub fn (o &OtherContext) str() string {
    return 'OtherContext'
}

struct WithContext {
pub mut:
    ctx Context
}

fn with_function(ctx Context) {
    println(ctx)
}

fn test_main() {
    mut s := WithContext{
        ctx: OtherContext{}
    }
    assert dump(s) == WithContext{
        ctx: OtherContext{}
    }

    assert dump(OtherContext{}) == OtherContext{}
}