Rating constructor
Rating({})
Implementation
Rating(
{this.rating = 6,
required this.onRatingSelected,
this.selectedColor,
this.unSelectedColor,
this.iconSize = 24.0,
this.horizontal = true,
this.initialRating = 1,
this.unSelectedIcon,
this.selectedIcon})
: assert(onRatingSelected != null),
assert(initialRating <= rating);