Does D 2.110 support named parameters?

[Brother Bill]

Does D 2.110 support named parameters, and if so, what 
configuration is necessary,
such as -preview=all

The following code doesn't compile on Window 11.
Is there D syntax that does work?

```
void main() {
    string[string] dictionary = [
            "blue": "mavi", "red": "kırmızı", "gray": "gri"
        ];
    }

// Want to have default keySeparator by ": "
printAA("Color Dictionary", aa, commaSeparator: "\n");

void printAA(string title, string[string] aa, string keySeparator 
= ": ", string commaSeparator = ", ")
{
     // ...
}



```