code: function(x){
                  var pqify = (proxyquireifyName != null) && cache[proxyquireifyName];
                  // Only try to use the proxyquireify version if it has been `require`d
                  if (pqify && pqify.exports._proxy) {
                      return pqify.exports._proxy(req, x);
                  } else {
                      return req(x);
                  }
              }
docs: The require function substituted for proxyquireify