do_action_deprecated( "{$action}" )

If the ‘postcustom’ meta box is enabled, then we need to perform some extra initialization on it.


File: wp-admin/includes/post.php. View all references


 * Prepares server-registered blocks for the block editor.
 * Returns an associative array of registered block data keyed by block name. Data includes properties
 * of a block relevant for client registration.

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