…its own lifetime.

Without this change taking a shared_ptr from an API call and passing it to method using classParam causes a nullptr exception, because the shared_ptr would go out of scope to early.

One example is the lib3mf API for the volumetric extension Volumetric.cpp

Instead of having to create objects to keep the shared_ptr alive like

auto composeYZXInputX = composeYZX->GetInputX();
auto decomposePosOutputZ = decomposePos->GetOutputZ();
gyroidFunction->AddLink(decomposePosOutputZ, composeYZXInputX);

we would now be able to write

gyroidFunction->AddLink(decomposePos->GetOutputZ(),  composeYZX->GetInputX());