Tries to lock current object. If object is
Placement - it's page will be locked as well;
Eplan.EplApi.DataModel.E3D.Placement3D locks it's installation space;
Function locks all it's connections and connection definition points;
Page locks all placements from this page. Throws
Eplan.EplApi.Base.LockingException on failure.
public:
void SmartLock();
