Futaba SBUS reverse engineered to work with Arduino

I've been trying to make this work and freely admit I am lost. installed the library, found the SerialPort library and installed it, now I get....

sketch_nov01a:15: error: 'class FUTABA_SBUS' has no member named 'begin'

I see the public declaration in Futaba_sbus.h, but don't see any function by that name. Should there be a cpp file that goes along with this. Not a C++ programmer so I am sure the problem is the vacant spots in my brain.

Any clarification would be greatly appreciated.