Dart APIunself_styleUnSymbolSizesUnSymbolSizes constructor UnSymbolSizes constructor Null safety UnSymbolSizes() unself_style unself_style UnSymbolSizes UnSymbolSizes constructor UnSymbolSizes class Constructors UnSymbolSizes Properties hashCode runtimeType Methods noSuchMethod toString Operators operator == Constants emojiL emojiM emojiXL Full L M None S XL XS