highest_installed_gems

# File lib/rubygems/commands/update_command.rb, line 137
  def highest_installed_gems # :nodoc:
    hig = {} # highest installed gems

    Gem::Specification.each do |spec|
      if hig[spec.name].nil? or hig[spec.name].version < spec.version
        hig[spec.name] = spec
      end
    end

    hig
  end