require_tree_for_spec

# File lib/bundler/installer/parallel_installer.rb, line 204
    def require_tree_for_spec(spec)
      tree = @spec_set.what_required(spec)
      t = String.new("In #{File.basename(SharedHelpers.default_gemfile)}:\n")
      tree.each_with_index do |s, depth|
        t << "  " * depth.succ << s.name
        unless tree.last == s
          t << %( was resolved to #{s.version}, which depends on)
        end
        t << %(\n)
      end
      t
    end