+ $this->__get($p)->set($v);
+ }
+
+ /**
+ * Unset a cell value
+ * @param string $p
+ */
+ function __unset($p) {
+ unset($this->data[$p]);
+ unset($this->cell[$p]);
+ }
+
+ /**
+ * Check if a cell isset
+ * @param string $p
+ * @return bool
+ */
+ function __isset($p) {
+ return isset($this->data[$p]) || isset($this->cell[$p]);
+ }
+
+ /**
+ * Get child rows of this row by foreign key
+ * @see \pq\Gateway\Table::of()
+ * @param string $foreign
+ * @param array $args [order, limit, offset]
+ * @return \pq\Gateway\Rowset
+ */
+ function __call($foreign, array $args) {
+ array_unshift($args, $this);
+ $table = forward_static_call(array(get_class($this->getTable()), "resolve"), $foreign);
+ return call_user_func_array(array($table, "of"), $args);