code: function addonsManager_getSearchFilter(aSpec) {
      var spec = aSpec || { };
  
      return this.getElements({
        type: "search_filterRadioButtons",
        subtype: spec.attribute,
        value: spec.value
      });
    }
docs: Returns the available search filters which match the filter criteria
  
  @param {object} aSpec
  Information about the filter to apply
  Elements: attribute - DOM attribute of the wanted filter
  [optional - default: ""]
  value     - Value of the DOM attribute
  [optional - default: ""]
  
  @returns List of search filters
  @type {array of ElemBase}