# File lib/faye-rails/filter.rb, line 17
    def initialize(channel='/**', direction=:any, block)
      @channel = channel
      @block = block
      raise ArgumentError, "Block cannot be nil" unless block
      if (direction == :in) || (direction == :any)
        @in_filter = DSL
      end
      if (direction == :out) || (direction == :any)
        @out_filter = DSL
      end
    end