Found the following hidden files and directories:
  src/duckdb/extension/core_functions/aggregate/holistic/._approximate_quantile.cpp
  src/duckdb/extension/parquet/include/writer/._templated_column_writer.hpp
  src/duckdb/src/common/types/._conflict_manager.cpp
  src/duckdb/src/common/types/column/._column_data_collection.cpp
  src/duckdb/src/execution/index/._bound_index.cpp
  src/duckdb/src/execution/index/._unbound_index.cpp
  src/duckdb/src/execution/operator/scan/._physical_positional_scan.cpp
  src/duckdb/src/execution/physical_plan/._plan_aggregate.cpp
  src/duckdb/src/execution/physical_plan/._plan_distinct.cpp
  src/duckdb/src/function/._macro_function.cpp
  src/duckdb/src/function/aggregate/._sorted_aggregate_function.cpp
  src/duckdb/src/function/table/._table_scan.cpp
  src/duckdb/src/function/table/system/._duckdb_log.cpp
  src/duckdb/src/include/duckdb/common/._allocator.hpp
  src/duckdb/src/include/duckdb/common/types/row/._block_iterator.hpp
  src/duckdb/src/include/duckdb/execution/._physical_plan_generator.hpp
  src/duckdb/src/include/duckdb/execution/index/._bound_index.hpp
  src/duckdb/src/include/duckdb/execution/index/._unbound_index.hpp
  src/duckdb/src/include/duckdb/function/._function_binder.hpp
  src/duckdb/src/include/duckdb/main/._db_instance_cache.hpp
  src/duckdb/src/include/duckdb/optimizer/._filter_combiner.hpp
  src/duckdb/src/include/duckdb/optimizer/join_order/._relation_manager.hpp
  src/duckdb/src/include/duckdb/optimizer/rule/._ordered_aggregate_optimizer.hpp
  src/duckdb/src/include/duckdb/planner/._binder.hpp
  src/duckdb/src/include/duckdb/planner/._bound_result_modifier.hpp
  src/duckdb/src/include/duckdb/planner/._expression_binder.hpp
  src/duckdb/src/include/duckdb/storage/table/._chunk_info.hpp
  src/duckdb/src/include/duckdb/storage/table/._row_group.hpp
  src/duckdb/src/include/duckdb/storage/table/._row_version_manager.hpp
  src/duckdb/src/include/duckdb/storage/table/._validity_column_data.hpp
  src/duckdb/src/logging/._log_storage.cpp
  src/duckdb/src/main/._connection.cpp
  src/duckdb/src/main/._database_manager.cpp
  src/duckdb/src/main/._db_instance_cache.cpp
  src/duckdb/src/main/capi/._duckdb-c.cpp
  src/duckdb/src/main/extension/._extension_alias.cpp
  src/duckdb/src/optimizer/._filter_combiner.cpp
  src/duckdb/src/optimizer/._late_materialization.cpp
  src/duckdb/src/optimizer/join_order/._relation_manager.cpp
  src/duckdb/src/optimizer/rule/._ordered_aggregate_optimizer.cpp
  src/duckdb/src/planner/._binder.cpp
  src/duckdb/src/planner/._bound_result_modifier.cpp
  src/duckdb/src/planner/._expression_binder.cpp
  src/duckdb/src/planner/binder/expression/._bind_star_expression.cpp
  src/duckdb/src/planner/binder/statement/._bind_copy.cpp
  src/duckdb/src/planner/binder/statement/._bind_insert.cpp
  src/duckdb/src/planner/binder/tableref/._bind_table_function.cpp
  src/duckdb/src/planner/expression/._bound_function_expression.cpp
  src/duckdb/src/planner/expression_binder/._constant_binder.cpp
  src/duckdb/src/storage/._storage_info.cpp
  src/duckdb/src/storage/checkpoint/._table_data_writer.cpp
  src/duckdb/src/storage/metadata/._metadata_manager.cpp
  src/duckdb/src/storage/table/._chunk_info.cpp
  src/duckdb/src/storage/table/._column_data.cpp
  src/duckdb/src/storage/table/._column_segment.cpp
  src/duckdb/src/storage/table/._row_group.cpp
  src/duckdb/src/storage/table/._row_group_collection.cpp
  src/duckdb/src/storage/table/._row_version_manager.cpp
  src/duckdb/src/storage/table/._standard_column_data.cpp
  src/duckdb/src/storage/table/._validity_column_data.cpp
These were most likely included in error. See section ‘Package
structure’ in the ‘Writing R Extensions’ manual.