如何在GWT中向Flextable添加行侦听器？

import com.google.gwt.user.client.ui.FlexTable;
import com.google.gwt.user.client.ui.FlexTable.FlexCellFormatter;
import com.google.gwt.user.client.ui.Widget;

FlexTable flexTable = new FlexTable();
flexTable.setRowCount(3);
flexTable.setColumnCount(2);

for (int row = 0; row < 3; row++) {
    for (int col = 0; col < 2; col++) {
        flexTable.setWidget(row, col, new Widget());
        FlexCellFormatter formatter = flexTable.getFlexCellFormatter();
        formatter.setStyleName(row, col, "your-style-name");
    }
}

flexTable.addClickHandler(event -> {
    int row = flexTable.getCellForEvent(event).getRowIndex();
    Window.alert("Clicked row: " + row);
});