presto-hive/src/main/java/io/prestosql/plugin/hive/metastore/cache/CachingHiveMetastore.java/CachingHiveMetastore/loadRoleGrants
class CachingHiveMetastore:    private Set<RoleGrant> loadRoleGrants(HivePrincipal principal)
    {
        return delegate.listRoleGrants(principal);
    }