lithium\data\Collection::schema PHP Метод

    public function schema($field = null)
    {
        $schema = null;
        switch (true) {
            case $this->_schema:
                $schema = $this->_schema;
                break;
            case $model = $this->_model:
                $schema = $model::schema();
                break;
        }
        if ($schema) {
            return $field ? $schema->fields($field) : $schema;
        }
    }