Choice<T> class

Represents a selectable choice item.

The key field serves dual purposes:

1. Unique identification for validation and selection tracking
2. Grouping: if key is null or empty, the choice acts as a group title

Example:

List<Choice<Car>> choices = [
  Choice(null, 'Sports Cars'),  // Group title
  Choice('1', 'Ferrari', metadata: Car(...)),
  Choice('2', 'Porsche', metadata: Car(...)),
  Choice(null, 'SUVs'),  // Another group title
  Choice('3', 'Range Rover', metadata: Car(...)),
];

Constructors

Choice(String? key, String value, {T? metadata})

const

Properties

hashCode → int

The hash code for this object.

no setter, override

key → String?

final

metadata → T?

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

value → String

final

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

override