Optional<T> class sealed

Constructors

Optional.empty()
factory
Optional.of(T value)
factory

Properties

hashCode int
The hash code for this object.
no setterinherited
runtimeType Type
A representation of the runtime type of the object.
no setterinherited
value → T?
no setter

Methods

fold<R>({required R onValue(T value), required R onEmpty()}) → R
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
present() bool
toString() String
A string representation of this object.
inherited

Operators

operator ==(Object other) bool
The equality operator.
inherited