Macro use_api 

macro_rules! use_api {
    ($fs:path, $server:path) => { ... };
    () => { ... };
}

Defines local filesystem API aliases with generated permissions.

The zero-argument form expands to:

• FileSystem = fs::FileSystem<FileSystemPermissions>
• File = fs::File<FileSystemPermissions>
• Dir = fs::Dir<FileSystemPermissions>

Use this from an app crate before constructing a FileSystem handle.