Combines this result with the specified result.
Combines this result with the specified result.
Returns a new result, with the message mapped to the specified constant.
Returns a new result, with the message mapped to the specified constant.
Detemines if the result failed.
Detemines if the result failed.
Returns a new result, with the message mapped by the specified function.
Returns a new result, with the message mapped by the specified function.
Detemines if the result succeeded.
Detemines if the result succeeded.