# File lib/bundler/source_list.rb, line 79
    def lock_sources
      if Bundler.feature_flag.lockfile_uses_separate_rubygems_sources?
        [[default_source], @rubygems_sources, git_sources, path_sources, plugin_sources].map do |sources|
          sources.sort_by(&:to_s)
        end.flatten(1)
      else
        lock_sources = (path_sources + git_sources + plugin_sources).sort_by(&:to_s)
        lock_sources << combine_rubygems_sources
      end
    end