Generated from: MR::PlanarTriangulation::ISweepLineCache keeps the internal buffers of the sweep-line triangulation alive between runs, so a caller triangulating many contour sets one by one avoids re-allocating them on every call; the entries returning a Mesh move the topology and the points out into it, so those two grow again on the next run, while \\ref triangulateDisjointContoursTopology keeps everything; one cache must not be used by several threads at once