when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>({
  1. required TResult repoRef(
    1. RepoRef data
    ),
  2. required TResult repoStrongRef(
    1. RepoStrongRef data
    ),
  3. required TResult messageRef(
    1. MessageRef data
    ),
  4. required TResult unknown(
    1. Map<String, dynamic> data
    ),
})

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?>({required TResult Function( RepoRef data)  repoRef,required TResult Function( RepoStrongRef data)  repoStrongRef,required TResult Function( MessageRef data)  messageRef,required TResult Function( Map<String, dynamic> data)  unknown,}) {final _that = this;
switch (_that) {
case USubjectStatusViewSubjectRepoRef():
return repoRef(_that.data);case USubjectStatusViewSubjectRepoStrongRef():
return repoStrongRef(_that.data);case USubjectStatusViewSubjectMessageRef():
return messageRef(_that.data);case USubjectStatusViewSubjectUnknown():
return unknown(_that.data);}
}