class Level
  @@interfaces = []
  @@description = ""
  @@count = 0

  attr_accessor :description

  def self.interfaces(arr = nil)
    if arr.nil?
      (["Interfaces:"] + @@interfaces).join("\n  ")
    else
      @@interfaces = arr
    end
  end

  def self.description(desc = nil)
    if desc.nil?
      @@description
    else
      @@description = desc
    end
  end
end