presto-spi/src/main/java/io/prestosql/spi/connector/classloader/ClassLoaderSafeSystemTable.java/ClassLoaderSafeSystemTable/cursor
class ClassLoaderSafeSystemTable:    @Override
    public RecordCursor cursor(ConnectorTransactionHandle transactionHandle, ConnectorSession session, TupleDomain<Integer> constraint)
    {
        try (ThreadContextClassLoader ignored = new ThreadContextClassLoader(classLoader)) {
            return delegate.cursor(transactionHandle, session, constraint);
        }
    }