whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>({
  1. TResult? accountCreated(
    1. AccountCreated data
    )?,
  2. TResult? emailUpdated(
    1. EmailUpdated data
    )?,
  3. TResult? emailConfirmed(
    1. EmailConfirmed data
    )?,
  4. TResult? passwordUpdated(
    1. PasswordUpdated data
    )?,
  5. TResult? handleUpdated(
    1. HandleUpdated data
    )?,
  6. TResult? unknown(
    1. Map<String, dynamic> data
    )?,
})

A variant of when that fallback to returning null

It is equivalent to doing:

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

Implementation

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>({TResult? Function( AccountCreated data)?  accountCreated,TResult? Function( EmailUpdated data)?  emailUpdated,TResult? Function( EmailConfirmed data)?  emailConfirmed,TResult? Function( PasswordUpdated data)?  passwordUpdated,TResult? Function( HandleUpdated data)?  handleUpdated,TResult? Function( Map<String, dynamic> data)?  unknown,}) {final _that = this;
switch (_that) {
case UEventDetailsAccountCreated() when accountCreated != null:
return accountCreated(_that.data);case UEventDetailsEmailUpdated() when emailUpdated != null:
return emailUpdated(_that.data);case UEventDetailsEmailConfirmed() when emailConfirmed != null:
return emailConfirmed(_that.data);case UEventDetailsPasswordUpdated() when passwordUpdated != null:
return passwordUpdated(_that.data);case UEventDetailsHandleUpdated() when handleUpdated != null:
return handleUpdated(_that.data);case UEventDetailsUnknown() when unknown != null:
return unknown(_that.data);case _:
  return null;

}
}