WP_Theme::get_screenshot( string $uri = 'uri' ): string|false

1262	public function get_screenshot( $uri = 'uri' ) {1263		$screenshot = $this->cache_get( 'screenshot' );1264		if ( $screenshot ) {1265			if ( 'relative' === $uri ) {1266				return $screenshot;1267			}1268			return $this->get_stylesheet_directory_uri() . '/' . $screenshot;1269		} elseif ( 0 === $screenshot ) {1270			return false;1271		}1272 1273		foreach ( array( 'png', 'gif', 'jpg', 'jpeg', 'webp', 'avif' ) as $ext ) {1274			if ( file_exists( $this->get_stylesheet_directory() . "/screenshot.$ext" ) ) {1275				$this->cache_add( 'screenshot', 'screenshot.' . $ext );1276				if ( 'relative' === $uri ) {1277					return 'screenshot.' . $ext;1278				}1279				return $this->get_stylesheet_directory_uri() . '/' . 'screenshot.' . $ext;1280			}1281		}1282 1283		$this->cache_add( 'screenshot', 0 );1284		return false;1285	}