### Godot version

Godot 4.0 RC 2

### System information

Windows 11

### Issue description

As the title states you get no autocompletion when statically typing.
Of course the code still works, but it shouldn't be neccessary to cast an object to a type it already is.

### Steps to reproduce

1. Create child class with some functionality
![image](https://user-images.githubusercontent.com/100119945/220173809-0b2b2788-d986-4fa7-815c-444268d09c32.png)

2. Get node in parent class and call childs function
![image](https://user-images.githubusercontent.com/100119945/220174167-5ff3c8e9-863e-4fbd-a3cf-d88d34597b39.png)



### Minimal reproduction project

N/A
#ifdef TOOLS_ENABLED
	if (Engine::get_singleton()->is_editor_hint()) {
		bool use_space_indentation = EDITOR_GET("text_editor/behavior/indent/type");
		if (use_space_indentation) {
			int indent_size = EDITOR_GET("text_editor/behavior/indent/size");
			return String(" ").repeat(indent_size);
		}
	}
#endif
	return "\t";
}
void GDScriptLanguage::auto_indent_code(String &p_code, int p_from_line, int p_to_line) const {
	String indent = _get_indentation();
	Vector<String> lines = p_code.split("\n");
	List<int> indent_stack;
	for (int i = 0; i < lines.size(); i++) {
		String l = lines[i];
		int tc = 0;
		for (int j = 0; j < l.length(); j++) {
			if (l[j] == ' ' || l[j] == '\t') {
				tc++;
			} else {
				break;
			}
		}
		String st = l.substr(tc, l.length()).strip_edges();
		if (st.is_empty() || st.begins_with("#")) {
			continue; 
		}
		int ilevel = 0;