in src/main/java/org/apache/nifi/extension/definition/extraction/ExtensionClassLoader.java [100:117]
private String toTree(final URLClassLoader classLoader) {
final StringBuilder sb = new StringBuilder();
sb.append("\n\n-------- Parent:\n");
final URL[] urls = classLoader.getURLs();
for (final URL url : urls) {
sb.append(url).append("\n");
}
final ClassLoader parent = classLoader.getParent();
if (parent instanceof URLClassLoader) {
final URLClassLoader urlParent = (URLClassLoader) parent;
sb.append(toTree(urlParent));
}
return sb.toString();
}