DragStep constructor
DragStep({})
Implementation
DragStep({
required this.dx,
required this.dy,
required this.testableId,
this.timeout,
}) : assert((dx != null && JsonClass.parseDouble(dx) != 0.0) ||
(dy != null && JsonClass.parseDouble(dy) != 0.0)),
assert(testableId.isNotEmpty == true);