Amcharts 4: overlapping LabelBullet text - amcharts

Question

I have a line chart with similar values.
Is there a way to automatically add padding when LabelBullets overlaps?
or some other elegant solution to this problem....
Either no one has this problem, or this problem has not yet occurred to anyone
I found only one question on this topic, but it remained unanswered
Here is a screenshot of the case
Jfiddle link
`HTML`
<script src="https://cdn.amcharts.com/lib/4/core.js"></script>
<script src="https://cdn.amcharts.com/lib/4/charts.js"></script>
<script src="https://cdn.amcharts.com/lib/4/themes/animated.js"></script>
<div id="chartdiv"></div>
`CSS`
#chartdiv {
width: 100%;
height: 500px;
}
`JS`
am4core.ready(function() {
// Themes begin
am4core.useTheme(am4themes_animated);
// Themes end
var chart = am4core.create("chartdiv", am4charts.XYChart);
var data = [
{
"year": "2015",
"b1": "10",
"b2": "12"
},
{
"year": "2016",
"b1": "20",
"b2": "22"
},
{
"year": "2017",
"b1": "30",
"b2": "32"
},
{
"year": "2018",
"b1": "40",
"b2": "42"
},
{
"year": "2019",
"b1": "20",
"b2": "22"
}
]
;
chart.data = data;
var categoryAxis = chart.xAxes.push(new am4charts.CategoryAxis());
var valueAxis = chart.yAxes.push(new am4charts.ValueAxis());
var yAxis = chart.yAxes.push(new am4charts.ValueAxis());
//remove grid
valueAxis.renderer.grid.template.strokeWidth = 0;
categoryAxis.renderer.grid.template.disabled = true;
valueAxis.renderer.labels.template.disabled = true;
// Create series
categoryAxis.dataFields.category = "year";
categoryAxis.renderer.minGridDistance = 10;
CreateLineSeries("b1", "Data1", false);
CreateLineSeries("b2", "Data2", false);
function CreateLineSeries(field, name, stacked) {
var LineValueAxis = chart.yAxes.push(new am4charts.ValueAxis());
LineValueAxis.renderer.opposite = true;
LineValueAxis.renderer.grid.template.disabled = true;
LineValueAxis.renderer.labels.template.disabled = true;
var LineSeries = chart.series.push(new am4charts.LineSeries())
LineSeries.dataFields.valueY = field;
LineSeries.dataFields.categoryX = "year";
LineSeries.yAxis = LineValueAxis;
LineSeries.name = name;
LineSeries.strokeWidth = 4
var bullet = LineSeries.bullets.push(new am4charts.Bullet());
var circle = bullet.createChild(am4core.Circle);
circle.radius = 6;
var labelBullet = LineSeries.bullets.push(new am4charts.LabelBullet());
labelBullet.label.text = "{valueY.formatNumber('###.')} %";
labelBullet.label.background.fill = am4core.color("lightgrey");
labelBullet.label.padding(4, 8, 4, 8);
labelBullet.dy = -25;
labelBullet.fillOpacity = 0.5;
}
});