#instanceMethodSync([optionalParameter]<Boolean>) => resultOfCall <String>
#instanceMethodAsync(someValue <Number>, [callback] <Function>) ->(error <String|null>, result <Number|null>)
#instanceMethodSync([optionalParameter]<Boolean>) => resultOfCall <String>
#instanceMethodAsync(someValue <Number>, [callback] <Function>) ->(error <String|null>, result <Number|null>)