instance method get_confidence

# File actionmailer/lib/action_mailer/vendor/tmail-1.2.7/tmail/vendor/rchardet-1.3/lib/rchardet/charsetgroupprober.rb, line 83
    def get_confidence()
      st = get_state()
      if st == EFoundIt
        return 0.99
      elsif st == ENotMe
        return 0.01
      end
      bestConf = 0.0
      @_mBestGuessProber = nil
      for prober in @_mProbers
        next unless prober
        unless prober.active
          $stderr << "#{prober.get_charset_name()} not active\n" if $debug
          next
        end
        cf = prober.get_confidence()
        $stderr << "#{prober.get_charset_name} confidence = #{cf}\n" if $debug
        if bestConf < cf
          bestConf = cf
          @_mBestGuessProber = prober
        end
      end
      return 0.0 unless @_mBestGuessProber
      return bestConf
      #        else
      #            self._mBestGuessProber = self._mProbers[0]
      #            return self._mBestGuessProber.get_confidence()
    end