The method in reference is the GetFields() method in the AdvancedArrayDataSource.php file.
I received the following errors.
Notice: Undefined offset: 0 in C:\wamp\www\order\KoolPHP\KoolControls\KoolGrid\ext\datasources\AdvancedArrayDataSource.php on line 108
Warning: Invalid argument supplied for foreach() in C:\wamp\www\order\KoolPHP\KoolControls\KoolGrid\ext\datasources\AdvancedArrayDataSource.php on line 108

function GetFields()
	{
		$_fields = array();
		foreach($this->_Data[0] as $_key=>$_value)
		{
			$_field = array("Name"=>$_key,"Type"=>gettype($_value),"Not_Null"=>false);
			array_push($_fields,$_field);
		}
		return $_fields;
	}

I did the following to apply the remedy to the problem. If you guys could do a permanent fix, I would greatly appreciate it so that I do not have to fix it each time I upgrade.

function GetFields()
	{
		$_fields = array();
                if(isset( $this->_Data[0] ) )
                {
                    foreach($this->_Data[0] as $_key=>$_value)
                    {
                            $_field = array("Name"=>$_key,"Type"=>gettype($_value),"Not_Null"=>false);
                            array_push($_fields,$_field);
                    }
                    return $_fields;
                }
	}

Hi Anthony,
Thanks for your feedback! We would make this fix for the future release of KoolGrid's data sources.
Rgds,

You could use array_key_exists() twice to check if the key exists.
if (array_key_exists("story", $arr) AND array_key_exists("message", $arr)) {
// Both keys exist.
}