framework/web/CDataProvider.php
public function getKeys($refresh=false)
	{
		if($this->_keys===null || $refresh)
			$this->_keys=$this->fetchKeys();
		return $this->_keys;
	}
public function getKeys($refresh=false)
	{
		if($this->_keys===null || $refresh)
			$this->_keys=$this->fetchKeys();
		return $this->_keys;
	}
public function getKeys ( $ refresh = false ) { if ( $ this -> _keys === null || $ refresh ) $ this -> _keys = $ this -> fetchKeys ( ) ; return $ this -> _keys ; }
Returns the key values associated with the data items.
@param boolean $refresh whether the keys should be re-calculated.
@return array the list of key values corresponding to {@link data}. Each data item in {@link data}
is uniquely identified by the corresponding key value in this array.
Returns the key values associated with the data items .