Where is BIND_THEME_ITEM

### Godot version

4.2

### godot-cpp version

4.2

### System information

windows 11

### Issue description

I want to inherit the separate implementation of CustomimSeparate, and I have observed this code:

```
void Separator::_bind_methods() {
BIND_THEME_ITEM (Theme: DATA-TYPE-CONSTANT, Separate, Separation);
BIND_THEME_ITEM_CUSTOM (Theme: DATA-TYPESTYLEBOX, Separator, separator_style, "separator");
}
```

So, may I ask godot cpp has "BIND_THEME_ITEM" or "BIND_THEME_ITEM_CUSTOM"?

### Steps to reproduce

null

### Minimal reproduction project

null