docs: function _get_filters(filter_manager){
  
      var lstate = filter_manager.get_filter_query_string();
      var lparams = bbop.url_parameters(decodeURIComponent(lstate));
      var filters_as_strings = [];
      us.each(lparams, function(lparam){
  	if( lparam[0] === 'fq' && lparam[1] ){
  	    filters_as_strings.push(lparam[1]);
  	}
      });
      //console.log('pass filter state: ', filters_as_strings);
  
      return filters_as_strings;
  }