lib/api.js
function(topics, cb) {
    var correlationId = _cbt.put(metaResponse(cb));
    var msg = envelope(meta.encode()
                           .correlation(correlationId)
                           .client(_options.clientId)
                           .topics(topics)
                           .end());
    sendMsg(msg, correlationId, cb);
  }
function(topics, cb) {
    var correlationId = _cbt.put(metaResponse(cb));
    var msg = envelope(meta.encode()
                           .correlation(correlationId)
                           .client(_options.clientId)
                           .topics(topics)
                           .end());
    sendMsg(msg, correlationId, cb);
  }
function ( topics , cb ) { var correlationId = _cbt . put ( metaResponse ( cb ) ) ; var msg = envelope ( meta . encode ( ) . correlation ( correlationId ) . client ( _options . clientId ) . topics ( topics ) . end ( ) ) ; sendMsg ( msg , correlationId , cb ) ; }
write a metadata request to kafka, storing the callback.

topics: array of topics to retreive information on
cb: callback
write a metadata request to kafka storing the callback .