class Gem::DependencyResolver::APISet

def versions(name)
  if @data.key?(name)
    return @data[name]
  end
  u = URI.parse "http://rubygems.org/api/v1/dependencies?gems=#{name}"
  str = Net::HTTP.get(u)
  Marshal.load(str).each do |ver|
    @data[ver[:name]] << ver
  end
  @data[name]
end