Swift Pass array by reference to ObjectiveC method

I just want to know how may I pass an array from Swift class to Objective C class by reference. I have idea for Swift to Swift by reference using inout keyword. But as ObjC uses pointers itself as object names. How may I inform Swift to pass the object by reference Instead of Value?

Code Snipshot

Swift:

class CheckReference: NSObject {    
    class func test() {

        let array : NSMutableArray! = nil
        ViewController.change(array) //ViewController.change(&array) doesn't work
        print(array)//does not changed 
    }
}

Objective C:

 + (void)changeArray:(NSMutableArray *)array
{
    if(!array)    
        array = [NSMutableArray array];
    [array addObject:@(2)];
}

Edit: For swift it works by changing methods as: But still Objective C interaction is not working.

class func test() {
    var array : NSMutableArray! = nil
    CheckReference.passByReference(arr: &array)
    print(array ?? "nothing")//prints 2

}
class func passByReference(arr: inout NSMutableArray!)
{
    arr = NSMutableArray()
    arr.add(2)
}