public function drill_in( $array, $tag = '{{json @root' ) {

		$back = array();
		foreach ( $array as $key => $value ) {
			if ( is_array( $value ) && ! empty( $value ) ) {
				$back[ $key ] = $this->drill_in( $value, $tag . '.' . $key );
			} else {
				$back[ $key ] = $tag . '.' . $key . '}}';
			}
		}

		return $back;
	}