You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: headers.rb
    path of file: ./repos/stackneveroverflow/vendor/bundle/ruby/2.3.0/gems/websocket-driver-0.6.5/lib/websocket/http
    
    the code of the file until where you have to start completion: module WebSocket
  module HTTP

    module Headers
      MAX_LINE_LENGTH = 4096
      CR = 0x0D
      LF = 0x0A

      # RFC 2616 grammar rules:
      #
      #       CHAR           = <any US-ASCII character (octets 0 - 127)>
      #
      #       CTL            = <any US-ASCII control character
      #                        (octets 0 - 31) and DEL (127)>
      #
      #       SP             = <US-ASCII SP, sp
    
      def parse(chunk)
        chunk.each_byte do |octet|
          if octet == LF and @stage < 2
            @buffer.pop if @buffer.last == CR
            if @buffer.empty?
              complete if @stage == 1
            else
              result = case @stage
                       when 0 then start_line(string_buffer)
                       when 1 then header_line(string_buffer)
                       end

              if result
                @stage = 1
              else
                error
              end