in core/src/main/java/com/google/cloud/sql/core/InternalConnectorRegistry.java [240:249]
public static void addArtifactId(String artifactId, boolean addVersion) {
String userAgent = artifactId;
if (addVersion) {
userAgent += "/" + version;
}
if (!userAgents.contains(userAgent)) {
userAgents.add(userAgent);
}
}