code: function saveCodepointsToFile(){
  			if (!o.codepointsFile) return;
  			var codepointsToString = JSON.stringify(o.codepoints, null, 4);
  			try {
  				fs.writeFileSync(o.codepointsFile, codepointsToString);
  				logger.verbose('Codepoints saved to file "' + o.codepointsFile + '".');
  			} catch (err) {
  				logger.error(err.message);
  			}
  		}
docs: Saves the codespoints to the set file