docs: protected GeneratorConfig createDefaultGeneratorConfig() {
  		final GeneratorConfig config = new GeneratorConfig();
  		if (this.defaultVersion == null) {
  			this.defaultVersion = JavaVersion.fromQualifier(System.getProperty("java.specification.version")); //$NON-NLS-1$
  			if (this.defaultVersion != null) {
  				config.setJavaSourceVersion(this.defaultVersion);
  			}
  		} else {
  			config.setJavaSourceVersion(this.defaultVersion);
  		}
  		return config;
  	}