code: function (done) {
          var dependencies = [],
              addPackageToDependencies = function (pkg) {
                  dependencies.push(pkg.name);
              };
  
          this.bundler.on('package', addPackageToDependencies);
  
          return this.compile(function (err) {
              this.bundler.removeListener('package', addPackageToDependencies);
              return done(err, _.uniq(dependencies).sort());
          }.bind(this));
      }
docs: Allows one to fetch a list of dependencies required by the bundle
  
  @param {Function} done - receives err, dependencies:Array