presto-spi/src/main/java/io/prestosql/spi/connector/classloader/ClassLoaderSafeConnectorAccessControl.java/ClassLoaderSafeConnectorAccessControl/filterColumns
class ClassLoaderSafeConnectorAccessControl:    @Override
    public List<ColumnMetadata> filterColumns(ConnectorSecurityContext context, SchemaTableName tableName, List<ColumnMetadata> columns)
    {
        try (ThreadContextClassLoader ignored = new ThreadContextClassLoader(classLoader)) {
            return delegate.filterColumns(context, tableName, columns);
        }
    }