code: function prune() {
  		//check if this database is meant to be pruned
  		if(~maxAge) {
  			var d = new Date();
  			d.setDate(d.getDate() - maxAge);
  
  			if(lastChecked < d) { // make sure we're not trying to prune more often than at least maxAge since the last time we did
  				mongoose_model.remove()
  					.where('updated_at').lt(d)
  					.exec(function(error, numAffected) {
  						lastChecked = new Date(); //update our lastChecked to reflect our touching the database
  						if(error) {
  							console.log("Error while removing docs from database", error);
  						} else {
  							if(options.verbose) {
  								console.log("Removed "+numAffected+" old docs from the database.");
  							}
  						}
  					});
  			}
  		}
  	}
docs: ### Returns None