when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. String address,
    2. String asset,
    3. int topoHeight
    )
)

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(@JsonKey(name: 'address')  String address, @JsonKey(name: 'asset')  String asset, @JsonKey(name: 'topoheight')  int topoHeight)  $default,) {final _that = this;
switch (_that) {
case _GetBalanceAtTopoHeightParams():
return $default(_that.address,_that.asset,_that.topoHeight);case _:
  throw StateError('Unexpected subclass');

}
}