## Summary of Changes The code exists already and only the documentation is missing. It is pretty close to the incremental builder of `Polyhedron_3`. ## Release Management * Affected package(s): Linear_cell_complex * Feature/Small Feature (if any): [link](https://cgal.geometryfactory.com/CGAL/Members/wiki/Features/Small_Features/Linear_cell_complex_incremental_builder_3), pre-approved by @gdamiand the 2th Feb 2023. * Link to compiled documentation [Reference Manual](https://cgal.github.io/7210/v0/Linear_cell_complex/classCGAL_1_1Linear__cell__complex__incremental__builder__3.html) and subsection for an [example](https://cgal.github.io/7210/v0/Linear_cell_complex/index.html#Linear_cell_complexIncrementalBuilderExample). * License and copyright ownership: cnrs