const responseCB = function()

in src/plugins/HttpPlugin.ts [93:108]


        const responseCB = function (this: any, res: any) {
          // may wrap callback instead of event because it procs first
          span.resync();

          copyStatusAndWrapEmit(res);

          try {
            if (callback) return callback.apply(this, arguments);
          } catch (err) {
            span.error(err);

            throw err;
          } finally {
            span.async();
          }
        };