Method sorting (1st occurance)

gistfile1.rb

class FirstOccuranceService
  def go!
    method_a
    method_b
  end

  private
  def method_a
    return if method_e?
    
    method_d
  end

  def method_e?
    true
  end

  def method_d
    "d"
  end
  
  def method_b
  return if method_e?
    
    method_c
  end
  
  def method_c
    "c"
  end
end