Allow derived classes to override SetContactable()
Allow derived classes to override SetContactable()

PedroTrujilloV/chrono,Bryan-Peterson/chrono,Bryan-Peterson/chrono,projectchrono/chrono,dariomangoni/chrono,amelmquist/chrono,rserban/chrono,Milad-Rakhsha/chrono,hsu/chrono,tjolsen/chrono,rserban/chrono,jcmadsen/chrono,jcmadsen/chrono,armanpazouki/chrono,rserban/chrono,dariomangoni/chrono,andrewseidl/chrono,jcmadsen/chrono,hsu/chrono,andrewseidl/chrono,amelmquist/chrono,rserban/chrono,projectchrono/chrono,armanpazouki/chrono,Milad-Rakhsha/chrono,hsu/chrono,jcmadsen/chrono,amelmquist/chrono,Milad-Rakhsha/chrono,rserban/chrono,Milad-Rakhsha/chrono,armanpazouki/chrono,projectchrono/chrono,tjolsen/chrono,Bryan-Peterson/chrono,jcmadsen/chrono,projectchrono/chrono,armanpazouki/chrono,jcmadsen/chrono,projectchrono/chrono,Milad-Rakhsha/chrono,Milad-Rakhsha/chrono,PedroTrujilloV/chrono,rserban/chrono,hsu/chrono,hsu/chrono,andrewseidl/chrono,PedroTrujilloV/chrono,andrewseidl/chrono,projectchrono/chrono,armanpazouki/chrono,dariomangoni/chrono,Bryan-Peterson/chrono,tjolsen/chrono,dariomangoni/chrono,rserban/chrono,jcmadsen/chrono,amelmquist/chrono,tjolsen/chrono,dariomangoni/chrono,Bryan-Peterson/chrono,armanpazouki/chrono,amelmquist/chrono,PedroTrujilloV/chrono,dariomangoni/chrono,amelmquist/chrono,tjolsen/chrono,PedroTrujilloV/chrono,andrewseidl/chrono