module SassListen::FSM::ClassMethods

def default_state(new_default = nil)

Passing a state name sets the default state
Obtain or set the default state 
def default_state(new_default = nil)
  if new_default
    @default_state = new_default.to_sym
  else
    defined?(@default_state) ? @default_state : DEFAULT_STATE
  end
end

def state(*args, &block)

* to: a state or array of states this state can transition to
Options:
Declare an FSM state and optionally provide a callback block to fire 
def state(*args, &block)
  if args.last.is_a? Hash
    # Stringify keys :/
    options = args.pop.each_with_object({}) { |(k, v), h| h[k.to_s] = v }
  else
    options = {}
  end
  args.each do |name|
    name = name.to_sym
    default_state name if options['default']
    states[name] = State.new(name, options['to'], &block)
  end
end

def states

Obtain the valid states for this FSM 
def states
  @states ||= {}
end