Overlapping Data Label

I just want to know how I can change the position of data.labels.

I have two data series in spline chart and the data are close so they are overlapping. Attached an image of the problem and the code


var chart = c3.generate({
data: {
bindto: "#chart",
labels: true,
columns: [
['data1', 25, 30, 40, 50, 150, 250],
['data2', 0, 29, 38, 51, 150, 50]
],
type: 'spline'
}
});

Reproduce the supplied spline-chart configuration and inspect the repository's data-label rendering and positioning entry points. Clarify whether the expected result is automatic collision avoidance or a public positioning option; the issue is complete only when the intended behavior is defined and covered by a reproducible test.

Written by the indexing model from the issue text.