private function getPageLevelBlockFormat(Cascade $c, Page $p)
 {
     $map = array();
     $config_set = $p->getConfigurationSet();
     $config_names = $config_set->getPageConfigurationNames();
     foreach ($config_names as $config_name) {
         $map[$config_name] = array();
         $config = $config_set->getPageConfiguration($config_name);
         $block_format_map = $p->getBlockFormatMap($config);
         $map[$config_name][] = $block_format_map;
     }
     return $map;
 }