presto-spi/src/main/java/io/prestosql/spi/connector/classloader/ClassLoaderSafeConnectorMetadata.java/ClassLoaderSafeConnectorMetadata/listRoleGrants
class ClassLoaderSafeConnectorMetadata:    @Override
    public Set<RoleGrant> listRoleGrants(ConnectorSession session, PrestoPrincipal principal)
    {
        try (ThreadContextClassLoader ignored = new ThreadContextClassLoader(classLoader)) {
            return delegate.listRoleGrants(session, principal);
        }
    }