createSegment method
Creates a segment for a data point in the series.
Implementation
@override
LineSegment<T, D> createSegment() {
  _hasNewSegmentAdded = true;
  return LineSegment<T, D>();
}Creates a segment for a data point in the series.
@override
LineSegment<T, D> createSegment() {
  _hasNewSegmentAdded = true;
  return LineSegment<T, D>();
}