    # File lib/rubygems/gem_path_searcher.rb, line 18
      def initialize
        # We want a record of all the installed gemspecs, in the order
        # we wish to examine them.
        @gemspecs = init_gemspecs
        # Map gem spec to glob of full require_path directories.
        # Preparing this information may speed up searches later.
        @lib_dirs = {}
        @gemspecs.each do |spec|
          @lib_dirs[spec.object_id] = lib_dirs_for(spec)
        end
      end