in maven-plugin-testing-harness/src/main/java/org/apache/maven/api/plugin/testing/stubs/RepositorySystemSupplier.java [510:516]
public final RemoteRepositoryManager getRemoteRepositoryManager() {
checkClosed();
if (remoteRepositoryManager == null) {
remoteRepositoryManager = createRemoteRepositoryManager();
}
return remoteRepositoryManager;
}