Keep only values which satisfy a predicate
Returns the result of applying f to this TryT if this TryT is not a Failure
Returns the result of applying f to this TryT if this TryT is not a Failure
a new TryT
Returns the result of applying f to this TryT if this TryT is not a Failure
Returns the result of applying f to this TryT if this TryT is not a Failure
a new TryT
Keep only values which satisfy a predicate