How to use

wait

function

in

Array

  files.wait(function(file, next) {
    databases.wait(function(filename, resume) {
    });
  }, () => remove.wait((item, next) => storage.remove(item.id, next)));
});

update.length && update.wait(function(item, next) {
  MAIN.session.update(item.id, item.data, null, null, null, next);
});

groups.wait(function(group, next) {