Entities – Changes to Drupal 8 ListBuilder do not reflect

I have a NodeEntityListBuilder class with the following items in my buildHeader a function:

public function buildHeader ()
{
$ header = array (
& # 39; title & # 39; => $ this-> t (& # 39; Title & # 39;),
& # 39; like & # 39; => array (
& # 39; data & # 39; => $ this-> t (& # 39; Content Type & # 39;),
& # 39; class & # 39; => array (RESPONSIVE_PRIORITY_MEDIUM),
)
& # 39; author & # 39; => array (
& # 39; data & # 39; => $ this-> t (& # 39;) & # 39;),
& # 39; class & # 39; => array (RESPONSIVE_PRIORITY_LOW),
)
& # 39; status & # 39; => $ this-> t (& # 39; Status & # 39;),
& # 39; changed & # 39; => table (
& # 39; data & # 39; => $ this-> t (& # 39; Updated & # 39;),
& # 39; class & # 39; => array (RESPONSIVE_PRIORITY_LOW),
)
)

return $ header + parent :: buildHeader ();
}

I'm trying to make changes to the headers. No matter what changes I make, this is not reflected in the administrator.

For example, change Type of content at Types of content.

I have tried to clear the cache by SQL:

TRUNCATE cache_config;
TRUNCATE cache_data;
TRUNCATE cache_default;
TRUNCATE cache_discovery;
TRUNCATE cache_entity;
TRUNCATE cache_menu;
TRUNCATE cache_render;
TRUNCATE cache_toolbar;

And also tried by the admin panel: Configuration> Performance> Clear all cache