function call through loader…

 

I have four files in the same directory at same level.

1] a.qml has a loaderA which loads a b.qml.
2] b.qml has a loaderB which loads a c.qml.
3] c.qml has a function.
4] now i want to call these function from a d.js file.

usually for one loader this can be achieved by loaderA.item.function, but how can i do it in this case.?
loaderA.item.loaderB.item.function didn’t work…