------------------------------------
[EventListener{
    x: 123
}, EventListener{
    x: 0
}, EventListener{
    x: 0
}]
- 1 level of indirection -
[&EventListener{
    x: 123
}, &0, &0]
[&EventListener{
    x: 123
}, &0, &0]
- 2 level of indirection -
[&&EventListener{
    x: 123
}, &&0, &&0]
- 3 level of indirection -
[&&&EventListener{
    x: 123
}, &&&0, &&&0]
-----------------------------------------------------
- all:
StructOfFixedArraysOfListeners{
    elisteners: [EventListener{
    x: 123
}, EventListener{
    x: 0
}, EventListener{
    x: 0
}]
    apelisteners: [&EventListener{
    x: 123
}, &0, &0]
    pelisteners: [&EventListener{
    x: 123
}, &0, &0]
    ppelisteners: [&&EventListener{
    x: 123
}, &&0, &&0]
    pppelisteners: [&&&EventListener{
    x: 123
}, &&&0, &&&0]
}
-----------------------------------------------------
[EventListener{
    x: 0
}, EventListener{
    x: 0
}]
[&0, &0]
[&&0, &&0]
-----------------------------------------------------
[&EventListener{
    x: 123
}, &EventListener{
    x: 0
}]