private function process_aliases( $aliases, $alias, $config_path, $operation = '' ) {
		// Convert data to YAML string.
		$yaml_data = Spyc::YAMLDump( $aliases );

		// Add data in config file.
		if ( file_put_contents( $config_path, $yaml_data ) ) {
			WP_CLI::success( "$operation '{$alias}' alias." );
		}
	}