mapOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? mapOrNull<TResult extends Object?>({
  1. TResult? create(
    1. URepoApplyWritesWritesCreate value
    )?,
  2. TResult? update(
    1. URepoApplyWritesWritesUpdate value
    )?,
  3. TResult? delete(
    1. URepoApplyWritesWritesDelete value
    )?,
  4. TResult? unknown(
    1. URepoApplyWritesWritesUnknown value
    )?,
})

A variant of map that fallback to returning null.

It is equivalent to doing:

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

Implementation

@optionalTypeArgs TResult? mapOrNull<TResult extends Object?>({TResult? Function( URepoApplyWritesWritesCreate value)?  create,TResult? Function( URepoApplyWritesWritesUpdate value)?  update,TResult? Function( URepoApplyWritesWritesDelete value)?  delete,TResult? Function( URepoApplyWritesWritesUnknown value)?  unknown,}){
final _that = this;
switch (_that) {
case URepoApplyWritesWritesCreate() when create != null:
return create(_that);case URepoApplyWritesWritesUpdate() when update != null:
return update(_that);case URepoApplyWritesWritesDelete() when delete != null:
return delete(_that);case URepoApplyWritesWritesUnknown() when unknown != null:
return unknown(_that);case _:
  return null;

}
}