RangeMaintainingScrollPhysics.fromJson constructor Null safety
Implementation
factory RangeMaintainingScrollPhysics.fromJson(Map<String, dynamic> json) =
_$RangeMaintainingScrollPhysics.fromJson;
factory RangeMaintainingScrollPhysics.fromJson(Map<String, dynamic> json) =
_$RangeMaintainingScrollPhysics.fromJson;