Function svn_fs_get_uuid 

pub unsafe extern "C" fn svn_fs_get_uuid(
    fs: *mut svn_fs_t,
    uuid: *mut *const c_char,
    pool: *mut apr_pool_t,
) -> *mut svn_error_t

Populate @a *uuid with the UUID associated with @a fs. Allocate @a *uuid in @a pool.