WIP Undo / Redo: ModelID / ModelBase renamed to ObjectID / ObjectBase

src/libslic3r/ObjectID.cpp

@@ -0,0 +1,9 @@
+#include "ObjectID.hpp"
+
+namespace Slic3r {
+
+size_t ObjectBase::s_last_id = 0;
+
+} // namespace Slic3r
+
+// CEREAL_REGISTER_TYPE(Slic3r::ObjectBase)