Исправление. Устранение предупреждения: Casting "Variant" to "Control" is unsafe.

scenes/pribor-externals/externals.gd

@@ -7,7 +7,7 @@ func _ready() -> void:
     if Engine.is_editor_hint():
         return
     for unit_inst in network.units.values():
-        var unit_panel = UnitPanel.instantiate() as Control
+        var unit_panel = UnitPanel.instantiate()
         unit_panel.fname = unit_inst.name
         $grid.add_child(unit_panel)
         unit_inst.connect('line_changed', on_line_changed.bind(unit_panel))