* It can be either a full edge or an edge to a virtual platform.
     *
     * @return true if used, false otherwise
     */
    boolean isUsed() {
        return used;
    }

    public boolean isArtifactOnlyEdge() {
        return !isTransitive && !dependencyMetadata.getArtifacts().isEmpty();
    }

            return true;
        }
        // We need to ignore external variants when all edges are artifact ones
        for (EdgeState incomingEdge : incomingEdges) {
            if (!incomingEdge.isArtifactOnlyEdge()) {
                return false;
            }
        }
        return true;
    }

    /*
     * When a node exits the graph, its constraints need to be cleaned up.
     * This means: