in transformer.js [40:50]
function regexToDelimiter(regex, delimiter, data, callback) {
var tokens = JSON.stringify(data).match(regex);
if (tokens) {
// emitting a new buffer as delimited text whose contents are the regex
// character classes
callback(null, new Buffer(tokens.slice(1).join(delimiter) + "\n"));
} else {
callback("Configured Regular Expression does not match any tokens", null);
}
};