Dart APIunself_styleUnSizessize06 size06 constant Null safety int const size06 Implementation static const size06 = 20; unself_style unself_style UnSizes size06 constant UnSizes class Constructors UnSizes Properties hashCode runtimeType Methods noSuchMethod toString Operators operator == Constants size00 size01 size02 size03 size04 size05 size06 size07 size08 size09 size10 size11 size12 size13 size14 size15 size16