in mps-maven-plugin/src/main/java/org/jetbrains/mps/mavenplugin/ArtifactCoordinates.java [29:41]
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
ArtifactCoordinates artifact = (ArtifactCoordinates) o;
if (!groupId.equals(artifact.groupId)) return false;
if (!artifactId.equals(artifact.artifactId)) return false;
if (!classifier.equals(artifact.classifier)) return false;
if (!extension.equals(artifact.extension)) return false;
return version.equals(artifact.version);
}