When I want to initialize a red black tree I do as in the documentation.

```
auto rbt = redBlackTree(1,2,3,4)

```

but if I want to declare it globally or make an array of red black trees I don't know how to do it and the documentation is not helping. I've tried various things and I frequently get errors similar to: `redBlackTree!int is used as a type` Can you help me? I could do it if I knew what to put instead of `auto`, ie, if I knew the type of `redBlackTree`.

I want to declare a red black tree in global scope or declare an array for which I need to declare the type, I want to do something like this:

```
type rbt;
void main() {
    rbt.insert(3);
}

```

or this:

```
void main{
    type[2] rbt;
    rbt[0].insert(1);
}

```