class Bundler::Settings::Mirrors

will be used to probe the mirror address to validate that the mirror replies.
@param prober [Prober object, nil] by default a TCPSocketProbe, this object
Class used to build the mirror set and then find a mirror for a given URI

def each 

def each
  @mirrors.each do |k, v|
    yield k, v.uri.to_s
  end
end

def fetch_valid_mirror_for(uri) 

def fetch_valid_mirror_for(uri)
  downcased = uri.to_s.downcase
  mirror = @mirrors[downcased] || @mirrors[Bundler::URI(downcased).host] || Mirror.new(uri)
  mirror.validate!(@prober)
  mirror = Mirror.new(uri) unless mirror.valid?
  mirror
end

def for(uri)

mirror that points to the provided uri
Depending on the uri having a valid mirror or not, it may be a

Returns a mirror for the given uri. 
def for(uri)
  if @all.validate!(@prober).valid?
    @all
  else
    fetch_valid_mirror_for(Settings.normalize_uri(uri))
  end
end

def initialize(prober = nil) 

def initialize(prober = nil)
  @all = Mirror.new
  @prober = prober || TCPSocketProbe.new
  @mirrors = {}
end

def parse(key, value) 

def parse(key, value)
  config = MirrorConfig.new(key, value)
  mirror = if config.all?
    @all
  else
    @mirrors[config.uri] ||= Mirror.new
  end
  config.update_mirror(mirror)
end