wp-notices.php
private function dismiss_user( $id ) {
		$dismissed = self::$instance->dismissed_user();
		if ( in_array( $id, $dismissed ) ) {
			return false;
		}
		array_push( $dismissed, $id );
		return update_user_meta( get_current_user_id(), 'tdp_dismissed_notices', $dismissed );
	}
private function dismiss_user( $id ) {
		$dismissed = self::$instance->dismissed_user();
		if ( in_array( $id, $dismissed ) ) {
			return false;
		}
		array_push( $dismissed, $id );
		return update_user_meta( get_current_user_id(), 'tdp_dismissed_notices', $dismissed );
	}
Dismiss notice for an user.

@param string $id the notice id.
@return void