# File lib/chef/resource_collection.rb, line 57
    def insert(resource)
      is_chef_resource(resource)
      if @insert_after_idx
        # in the middle of executing a run, so any resources inserted now should
        # be placed after the most recent addition done by the currently executing
        # resource
        @resources.insert(@insert_after_idx + 1, resource)
        # update name -> location mappings and register new resource
        @resources_by_name.each_key do |key|
          @resources_by_name[key] += 1 if @resources_by_name[key] > @insert_after_idx
        end
        @resources_by_name[resource.to_s] = @insert_after_idx + 1
        @insert_after_idx += 1
      else  
        @resources << resource
        @resources_by_name[resource.to_s] = @resources.length - 1
      end
    end