class SimpleCov::Formatter::MultiFormatter

def self.[](*args)
  warn "#{Kernel.caller.first}: [DEPRECATION] ::[] is deprecated. Use ::new instead."
  new(Array(args))
end

def self.new(formatters = nil)
  Class.new do
    define_method :formatters do
      @formatters ||= Array(formatters)
    end
    include InstanceMethods
  end
end