when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. int total,
    2. int spent,
    3. int left,
    4. @JsonKey.new(name: 'key_total') int? keyTotal,
    5. @JsonKey.new(name: 'key_spent') int keySpent,
    6. @JsonKey.new(name: 'key_left') int? keyLeft,
    7. @JsonKey.new(name: 'limited_by', unknownEnumValue: PlanLimitAllowance.unknown) PlanLimitAllowance limitedBy,
    )
)

A switch-like method, using callbacks.

As opposed to map, this offers destructuring. It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case Subclass2(:final field2):
    return ...;
}

Implementation

@optionalTypeArgs TResult when<TResult extends Object?>(TResult Function( int total,  int spent,  int left, @JsonKey(name: 'key_total')  int? keyTotal, @JsonKey(name: 'key_spent')  int keySpent, @JsonKey(name: 'key_left')  int? keyLeft, @JsonKey(name: 'limited_by', unknownEnumValue: PlanLimitAllowance.unknown)  PlanLimitAllowance limitedBy)  $default,) {final _that = this;
switch (_that) {
case _PlanLimit():
return $default(_that.total,_that.spent,_that.left,_that.keyTotal,_that.keySpent,_that.keyLeft,_that.limitedBy);}
}