Changes Types Union Type Mixed Type Operators Nullsafe Operator Attributes Attributes Classes Constructors Constructor Property Promotion Return types Static Return Type Literals Class Name Literal Interfaces Stringable Interface Maps Weap Maps Errors Throw Expression Non-capturing Catches Parameters Named Arguments Trailing Comma in Parameter Lists Functions strcontains() strstartswith() strendswith() getdebugtype() getresourceid() Objects DateTime createFromInterface() Expressions Match expression