maybeMap<TResult extends Object?> method

  1. @optionalTypeArgs
TResult maybeMap<TResult extends Object?>({
  1. TResult formData(
    1. _FormData value
    )?,
  2. TResult basic(
    1. _Basic value
    )?,
  3. TResult data(
    1. _Data value
    )?,
  4. required TResult orElse(),
})

A variant of map that fallback to returning orElse.

It is equivalent to doing:

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

Implementation

@optionalTypeArgs TResult maybeMap<TResult extends Object?>({TResult Function( _FormData value)?  formData,TResult Function( _Basic value)?  basic,TResult Function( _Data value)?  data,required TResult orElse(),}){
final _that = this;
switch (_that) {
case _FormData() when formData != null:
return formData(_that);case _Basic() when basic != null:
return basic(_that);case _Data() when data != null:
return data(_that);case _:
  return orElse();

}
}