public void schemeEditorAddContact() {
        if(ce_circuit2.getSelectionIndex() == -1 || ce_drain.getSelectionIndex() == -1) return;
        String circuitName = ce_circuit2.getText();
        String contactName = ce_drain.getText();
        
        scheme.getCircuits().get(circuitName).getContacts().add(new Contact(contactName));
        
        schemeEditorSchemeChanged();
    }