capability_response

# File lib/net/imap.rb, line 2733
      def capability_response
        token = match(T_ATOM)
        name = token.value.upcase
        match(T_SPACE)
        data = []
        while true
          token = lookahead
          case token.symbol
          when T_CRLF
            break
          when T_SPACE
            shift_token
          end
          data.push(atom.upcase)
        end
        return UntaggedResponse.new(name, data, @str)
      end