I already fixed this in PR #7186, but the file path should be passed to `PreferencesManager.get()`:

```
    function _getIndentSize(fullPath) {
        return PreferencesManager.get(
            PreferencesManager.get("useTabChar", fullPath) ? "tabSize" : "spaceUnits",
            fullPath
        );
    }
```

Then pass "fullPath" to this function below.