// expander
TableWithChildNodesExpander tableExpander = new TableWithChildNodesExpander();
// extractors
ITableIndexExtractor indexExtractor = new PostgresTableIndexExtractorImpl();
ITableTriggerExtractor triggerExtractor = new PostgresTableTriggerExtractorImpl();
tableExpander.setTableTriggerExtractor(triggerExtractor);
tableExpander.setTableIndexExtractor(indexExtractor);
_treeAPI.addExpander(DatabaseObjectType.TABLE, tableExpander);