hitTest method
Implementation
bool hitTest(DiagramPoint localPoint, {double tolerance = 0}) =>
outline.contains(localPoint) ||
(tolerance > 0 && outline.bounds.inflate(tolerance).contains(localPoint));
bool hitTest(DiagramPoint localPoint, {double tolerance = 0}) =>
outline.contains(localPoint) ||
(tolerance > 0 && outline.bounds.inflate(tolerance).contains(localPoint));