code: function (filterContainer) {
  			this.writeDebug('getFilterKey',arguments);
  			for (var key in this.settings.taxonomyFilters) {
  				if (this.settings.taxonomyFilters.hasOwnProperty(key)) {
  					for (var i = 0; i < this.settings.taxonomyFilters[key].length; i++) {
  						if (this.settings.taxonomyFilters[key] === filterContainer) {
  							return key;
  						}
  					}
  				}
  			}
  		}
docs: Get the filter key from the taxonomyFilter setting
  
  @param filterContainer {string} ID of the changed filter's container