map<TResult extends Object?> method

  1. @optionalTypeArgs
TResult map<TResult extends Object?>({
  1. required TResult file(
    1. XXFile value
    ),
  2. required TResult network(
    1. XXImage value
    ),
})

A switch-like method, using callbacks.

Callbacks receives the raw object, upcasted. It is equivalent to doing:

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

Implementation

@optionalTypeArgs TResult map<TResult extends Object?>({required TResult Function( XXFile value)  file,required TResult Function( XXImage value)  network,}){
final _that = this;
switch (_that) {
case XXFile():
return file(_that);case XXImage():
return network(_that);}
}