mapOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? mapOrNull<TResult extends Object?>({
  1. TResult? createResult(
    1. URepoApplyWritesResultsCreateResult value
    )?,
  2. TResult? updateResult(
    1. URepoApplyWritesResultsUpdateResult value
    )?,
  3. TResult? deleteResult(
    1. URepoApplyWritesResultsDeleteResult value
    )?,
  4. TResult? unknown(
    1. URepoApplyWritesResultsUnknown 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( URepoApplyWritesResultsCreateResult value)?  createResult,TResult? Function( URepoApplyWritesResultsUpdateResult value)?  updateResult,TResult? Function( URepoApplyWritesResultsDeleteResult value)?  deleteResult,TResult? Function( URepoApplyWritesResultsUnknown value)?  unknown,}){
final _that = this;
switch (_that) {
case URepoApplyWritesResultsCreateResult() when createResult != null:
return createResult(_that);case URepoApplyWritesResultsUpdateResult() when updateResult != null:
return updateResult(_that);case URepoApplyWritesResultsDeleteResult() when deleteResult != null:
return deleteResult(_that);case URepoApplyWritesResultsUnknown() when unknown != null:
return unknown(_that);case _:
  return null;

}
}