Error: no property "someFont" for type int

[Marco de Wild via Digitalmars-d-learn]

I'm trying to build a small manga reader application (because why 
search the internet if you can build it yourself), using DSFML. 
However, I'm getting a weird compilation error that I can't 
decrypt.

In directory.d:
using style;
(...)
_text = new Text;
with(_text)
{
    setFont(Style.DirectoryFont);

In style.d:
module style;
(...)
public static class Style
{
    private static Font _font;
    public static Font DirectoryFont()
    {
        if(!(_font is null)) return _font;
        _font = new Font;
        Load(_font); // Helper function that loads the font into 
_font
        return _font;
    }
}

I'm getting the error message that the compiler can't find
source/directory.d(...) : Error: no property 'DirectoryFont' for 
type 'int'.
When I change the line to actually contain the (iirc optional) 
brackets, the type changes to 'Style'. Am I missing something 
with regards to static classes and members in D?
Thanks in advance.