GUI: double notification after instrument data change?

The signal GISASInstrumentEditor::dataChanged is connected to these two functions:

void InstrumentView::onInstrumentChangedByEditor()
{
    m_document->multiNotifier()->notifyInstrumentChanged(
        m_instrumentListView->currentInstrumentItem());
}

void InstrumentLibraryEditor::onInstrumentChangedByEditor()
{
    auto* currentInstrument = m_treeModel->itemForIndex(m_ui->treeView->currentIndex());
    m_instrumentLibrary->editController()->notifyInstrumentChanged(currentInstrument);
}

Do they do different things? If yes, provide explanation in function intent comment. If no, remove one of them.