class Protobuf::CLI

def multi_mode?

Internal helper to determine if the modes are multi-set which is not valid. 
def multi_mode?
  (options.zmq? && (options.evented? || options.socket?)) \
    && (options.evented? && (options.evented? || options.socket?)) \
    && (options.zmq? && (options.evented? || options.socket?)) \
end