Sources kept for possible revival. Nothing here is compiled, installed or documented: no CMake list names these files, and doc/CMakeLists.txt excludes */attic/* from Doxygen.

NetWithAttractor.{h,cpp} — the 3.0-era Seine/Net SimObject. It was de-registered in 3.1.0 and derives from NetStructure, a base class this repository no longer provides, so it does not compile as is. Kept by owner decision (FISH-0013).