body_fld_dsp

# File lib/net/imap.rb, line 2395
      def body_fld_dsp
        token = lookahead
        if token.symbol == T_NIL
          shift_token
          return nil
        end
        match(T_LPAR)
        dsp_type = case_insensitive_string
        match(T_SPACE)
        param = body_fld_param
        match(T_RPAR)
        return ContentDisposition.new(dsp_type, param)
      end