re WordPress.Security.EscapeOutput.ExceptionNotEscaped
			throw new \InvalidArgumentException( self::class_name_without_namespace( __CLASS__ ) . '::' . __FUNCTION__ . ': the values array is empty' );
		}

		return '(' . implode( ',', $values ) . ')';
	}

	/**
	 * Get the name of a class without the namespace.
	 *
	 * @param string $class_name The full class name.
	 * @return string The class name without the namespace.
	 */
	public static function class_name_without_namespace( string $class_name ) {
		// A '?:' would convert this to a one-liner, but WP coding standards disallow these :shrug:.
		$result = substr( strrchr( $class_name, '\\' ), 1 );
		return $result ? $result : $class_name;
	}

	/**
	 * Normalize the slashes (/ and \) of a local filesystem path by converting them to DIRECTORY_SEPARATOR.
	 *
	 * @param string|null $path Path to normalize.
	 * @return string|null Normalized path, or null if the input was null.
	 */
	public static function normalize_local_path_slashes( ?string $path ) {
		return is_null( $path ) ? null : str_replace( array( '\\', '/' ), DIRECTORY_SEPARATOR, $path );
	}
}