import org.apache.maven.api.annotations.Immutable;
import org.apache.maven.api.annotations.Nonnull;

/**
 * A result of collecting, flattening and resolving {@link DependencyCoordinates}s.
 * Dependency is the output of the <dfn>collection</dfn> process, which builds the graph of dependencies,
 * followed by <dfn>flattening</dfn> and <dfn>resolution</dfn>.
 * The version selection is done for each dependency during the collection phase.

 *
 * <p><dfn>Dependency collection</dfn> builds a graph of {@link org.apache.maven.api.Node} objects representing
 * all the dependencies.</p>
 *
 * <p>The <dfn>Dependency graph flattening</dfn> process in Maven involves reducing a complex,
 * multi-level dependency graph to a simpler list where only the most relevant version of each artifact

     * @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)
}