Как изменить цвет и толщину линии ссылки Google Organization Chart?

google.charts.load('current', {
  packages: ['orgchart']
}).then(function () {
  var data = new google.visualization.DataTable();
  data.addColumn('string', 'Name');
  data.addColumn('string', 'Manager');
  data.addColumn('string', 'ToolTip');
  data.addRows([
    [{v:'Mike', f:'Mike<div style = "color:red; font-style:italic">President</div>'},
     '', 'The President'],
    [{v:'Jim', f:'Jim<div style = "color:red; font-style:italic">Vice President</div>'},
     'Mike', 'VP'],
    ['Alice', 'Mike', ''],
    ['Bob', 'Jim', 'Bob Sponge'],
    ['Carol', 'Bob', '']
  ]);

  var chart = new google.visualization.OrgChart(document.getElementById('chart_div'));
  chart.draw(data, {allowHtml:true});
});

#chart_div .google-visualization-orgchart-linebottom {
  border-bottom: 4px solid magenta;
}

#chart_div .google-visualization-orgchart-lineleft {
  border-left: 4px solid magenta;
}

#chart_div .google-visualization-orgchart-lineright {
  border-right: 4px solid magenta;
}

#chart_div .google-visualization-orgchart-linetop {
  border-top: 4px solid magenta;
}

<script src = "https://www.gstatic.com/charts/loader.js"></script>
<div id = "chart_div"></div>