fn test_interface_embedding_complex() {
    mut win := &Window{}
    ll := &LinearLayout{}
    win.initables << ll
    win.init()
}

//----------------------------------

@[heap]
pub struct Window {
mut:
    initables []Initable
}

interface Initable {
    get_ptr()
mut:
    init(&Window)
}

fn (mut w Window) init() {
    for mut i in w.initables {
        i.init(w)
    }
}

//----------------------------------

pub struct ViewBase {}

pub fn (mut vb ViewBase) init(window &Window) {
    dump(@METHOD)
    assert false
}

pub fn (vb ViewBase) get_ptr() {}

//-------------------------------------

@[heap]
pub struct ContainerBase {
    ViewBase
}

// want to execute this method
pub fn (mut cb ContainerBase) init(window &Window) {
    dump(@METHOD)
    assert true
}

//--------------------------------------

@[heap]
pub struct LinearLayout {
    ContainerBase
}