class Gem::Specification

def self.stubs
  @@stubs ||= begin
    pattern = "*.gemspec"
    stubs = default_stubs(pattern).concat installed_stubs(dirs, pattern)
    stubs = uniq_by(stubs) { |stub| stub.full_name }
    _resort!(stubs)
    @@stubs_by_name = stubs.group_by(&:name)
    stubs
  end
end