presto-spi/src/main/java/io/prestosql/spi/connector/classloader/ClassLoaderSafeConnectorMetadata.java/ClassLoaderSafeConnectorMetadata/dropRole
class ClassLoaderSafeConnectorMetadata:    @Override
    public void dropRole(ConnectorSession session, String role)
    {
        try (ThreadContextClassLoader ignored = new ThreadContextClassLoader(classLoader)) {
            delegate.dropRole(session, role);
        }
    }