this.key = getGroupId()
                + ':'
                + getArtifactId()
                + ':'
                + getExtension()
                + (getClassifier().isEmpty() ? "" : ":" + getClassifier())
                + ':'
                + getVersion();
    }

    public org.eclipse.aether.artifact.Artifact getArtifact() {
        return artifact;
    }

    @Override

        this.key = getGroupId()
                + ':'
                + getArtifactId()
                + ':'
                + getExtension()
                + (getClassifier().isEmpty() ? "" : ":" + getClassifier())
                + ':'
                + getVersion();
    }

    public org.eclipse.aether.artifact.Artifact getArtifact() {
        return artifact;
    }

    @Override

                    if (classifier == null) {
                        if (a.getClassifier() != null) {
                            result = 1;
                        }
                    } else {
                        if (a.getClassifier() != null) {
                            result = classifier.compareTo(a.getClassifier());
                        } else {
                            result = -1;