I have the following directory structure:

```
/Admin/Grid
   abc.ts  // this file contains the one function abc()
   xxx.ts  // this file contains the one function xxx()

/Admin/Dialog
   abc.ts  // this file contains the one function abc()

```

I load both all three javascripts into my browser. 

The function xxx() looks like this:

```
function xxx() {
   // do abc
   abc();
}

```

Is there a way using typescript that I can tell the function xxx to execute the function abc that's inside the file in the /Admin/Dialog directory?