in src/main/java/org/apache/nifi/extension/definition/extraction/ExtensionClassLoaderFactory.java [92:110]
public ExtensionClassLoader createExtensionClassLoader() throws MojoExecutionException, ProjectBuildingException {
final Artifact narArtifact = project.getArtifact();
final Set<Artifact> narArtifacts = getNarDependencies(narArtifact);
final ArtifactsHolder artifactsHolder = new ArtifactsHolder();
artifactsHolder.addArtifacts(narArtifacts);
getLog().debug("Project artifacts: ");
narArtifacts.forEach(artifact -> getLog().debug(artifact.getArtifactId()));
final ExtensionClassLoader parentClassLoader = createClassLoader(narArtifacts, artifactsHolder);
final ExtensionClassLoader classLoader = createClassLoader(narArtifacts, parentClassLoader, narArtifact);
if (getLog().isDebugEnabled()) {
getLog().debug("Full ClassLoader is:\n" + classLoader.toTree());
}
return classLoader;
}