stubs_for

# File lib/rubygems/specification.rb, line 863
  def self.stubs_for name
    if @@stubs
      @@stubs_by_name[name] || []
    else
      pattern = "#{name}-*.gemspec"
      stubs = default_stubs(pattern) + installed_stubs(dirs, pattern)
      stubs = uniq_by(stubs) { |stub| stub.full_name }.group_by(&:name)
      stubs.each_value { |v| _resort!(v) }

      @@stubs_by_name.merge! stubs
      @@stubs_by_name[name] ||= EMPTY
    end
  end