code: function (kb, x, contentTypes) {
        var cts = kb.fetcher.getHeader(x, 'content-type')
        if (cts) {
          for (var j = 0; j < cts.length; j++) {
            for (var k = 0; k < contentTypes.length; k++) {
              if (cts[j].indexOf(contentTypes[k]) >= 0) {
                return true
              }
            }
          }
        }
        return false
      }
docs: See also the source pane, which has lower precedence.