no private instance operator methods

operator_dilemma

class Klass
  def test
    thread_first  "",
                  Runner,
                  Runner,
                  Runner
    self.>>  "",
        Runner,
        Runner,
        Runner
  end
  
  def >>(*objs)
    thread_first objs
  end
  
  private
  def thread_first(*objs)
    objs.reduce(objs.shift) do |memo, obj|
      obj.send(:run, memo)
    end
  end
  
  class Runner
    def self.run(obj)
      obj
    end
  end
end