code: function EventTransmitter(opts) {
    var hash;
  
    PassThrough.call(this);
  
    opts = opts || {};
  
    hash = crypto.createHash('sha1', opts.delimeter || 'jambalaya');
    hash.setEncoding('hex');
    hash.end();
  
    this.delimiter = '<' + hash.read().substr(0, 10) + '>';
    this.opts = opts;
  }
docs: main constructor