* @return flattened list of node with the given build path scope
     * @throws org.apache.maven.api.services.DependencyResolverException if the dependency flattening failed
     *
     * @see org.apache.maven.api.services.DependencyResolver#flatten(Session, Node, PathScope)
     */
    @Nonnull
    List<Node> flattenDependencies(@Nonnull Node node, @Nonnull PathScope scope);

	TimeToResponseNS int64  `json:"timeToResponseNS"`
	OutputBytes      int64  `json:"tx,omitempty"`
	Error            string `json:"error,omitempty"`
}

func (op auditTierOp) String() string {
	// flattening the auditTierOp{} for audit
	return fmt.Sprintf("tier:%s,respNS:%d,tx:%d,err:%s", op.Tier, op.TimeToResponseNS, op.OutputBytes, op.Error)
}