c_gtk_icon_theme_load_icon_for_scale

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
__gshared extern (C)
GdkPixbuf* function(GtkIconTheme* iconTheme, const(char)* iconName, int size, int scale, GtkIconLookupFlags flags, GError** err) c_gtk_icon_theme_load_icon_for_scale;

Meta