/**
* Get an instance of the block from the block name
*
* @param string $block
* @param array $attributes
* @return Core_Block_Abstract
*/
protected function _getBlockInstance($block, array $attributes = array())
{
$block = App_Main::getBlockInstance($block, $attributes);
if (empty($block)) {
App_Main::throwException('Invalid block type: %s', $block);
}
if (!$block instanceof Core_Block_Abstract) {
App_Main::throwException('Invalid block type: %s', $block);
}
return $block;
}