```ruby
require 'round_robin/worker'

module RoundRobin
  def add(klass, *args)

  end

  def remove(klass, *args)

  end
end
```

Make RoundRoubin methods class methods
user
```ruby
require 'round_robin/worker'

module RoundRobin
  def self.add(klass, *args)

  end

  def self.remove(klass, *args)

  end
end
```
assistant