var freebusyParam = function()

in js/libs/ical.js [237:253]


    var freebusyParam = function (name) {
      return function(val, params, curr){
        var fb = addFBType({}, params);
        curr[name] = curr[name] || []
        curr[name].push(fb);
  
        storeParam(val, params, fb);
  
        var parts = val.split('/');
  
        ['start', 'end'].forEach(function (name, index) {
          dateParam(name)(parts[index], params, fb);
        });
  
        return curr;
      }
    }