apply_filters( 'site_allowed_themes', string[] $allowed_themes, int $blog_id )

1715			 *1716			 * @since 4.5.01717			 *1718			 * @param string[] $allowed_themes An array of theme stylesheet names.1719			 * @param int      $blog_id        ID of the site. Defaults to current site.1720			 */1721			return (array) apply_filters( 'site_allowed_themes', $allowed_themes[ $blog_id ], $blog_id );1722		}1723 1724		$current = get_current_blog_id() === $blog_id;1725 1726		if ( $current ) {1727			$allowed_themes[ $blog_id ] = get_option( 'allowedthemes' );