Function svn_fs_is_dir 

pub unsafe extern "C" fn svn_fs_is_dir(
    is_dir: *mut svn_boolean_t,
    root: *mut svn_fs_root_t,
    path: *const c_char,
    pool: *mut apr_pool_t,
) -> *mut svn_error_t

Set @a *is_dir to @c TRUE iff @a path in @a root is a directory. Do any necessary temporary allocation in @a pool.