in mps-maven-plugin/src/main/java/org/jetbrains/mps/mavenplugin/ArtifactCoordinates.java [44:51]
public int hashCode() {
int result = groupId.hashCode();
result = 31 * result + artifactId.hashCode();
result = 31 * result + classifier.hashCode();
result = 31 * result + extension.hashCode();
result = 31 * result + version.hashCode();
return result;
}