don't use isNamespaceLoaded (specific to newer versions of R)
don't use isNamespaceLoaded (specific to newer versions of R)

JanMarvin/rstudio,edrogers/rstudio,jzhu8803/rstudio,jrnold/rstudio,jrnold/rstudio,githubfun/rstudio,suribes/rstudio,thklaus/rstudio,jar1karp/rstudio,thklaus/rstudio,jar1karp/rstudio,edrogers/rstudio,tbarrongh/rstudio,jzhu8803/rstudio,john-r-mcpherson/rstudio,jrnold/rstudio,more1/rstudio,thklaus/rstudio,jrnold/rstudio,piersharding/rstudio,more1/rstudio,more1/rstudio,edrogers/rstudio,brsimioni/rstudio,jrnold/rstudio,suribes/rstudio,jar1karp/rstudio,thklaus/rstudio,jzhu8803/rstudio,jrnold/rstudio,tbarrongh/rstudio,suribes/rstudio,piersharding/rstudio,edrogers/rstudio,vbelakov/rstudio,thklaus/rstudio,jzhu8803/rstudio,edrogers/rstudio,john-r-mcpherson/rstudio,JanMarvin/rstudio,JanMarvin/rstudio,jar1karp/rstudio,john-r-mcpherson/rstudio,brsimioni/rstudio,jzhu8803/rstudio,john-r-mcpherson/rstudio,JanMarvin/rstudio,piersharding/rstudio,more1/rstudio,tbarrongh/rstudio,jar1karp/rstudio,brsimioni/rstudio,vbelakov/rstudio,tbarrongh/rstudio,JanMarvin/rstudio,tbarrongh/rstudio,brsimioni/rstudio,suribes/rstudio,jzhu8803/rstudio,githubfun/rstudio,thklaus/rstudio,githubfun/rstudio,brsimioni/rstudio,john-r-mcpherson/rstudio,more1/rstudio,vbelakov/rstudio,john-r-mcpherson/rstudio,edrogers/rstudio,jzhu8803/rstudio,more1/rstudio,piersharding/rstudio,piersharding/rstudio,jrnold/rstudio,vbelakov/rstudio,piersharding/rstudio,more1/rstudio,piersharding/rstudio,more1/rstudio,brsimioni/rstudio,thklaus/rstudio,JanMarvin/rstudio,jar1karp/rstudio,githubfun/rstudio,tbarrongh/rstudio,edrogers/rstudio,githubfun/rstudio,vbelakov/rstudio,jrnold/rstudio,JanMarvin/rstudio,jrnold/rstudio,suribes/rstudio,suribes/rstudio,brsimioni/rstudio,john-r-mcpherson/rstudio,tbarrongh/rstudio,brsimioni/rstudio,githubfun/rstudio,jar1karp/rstudio,edrogers/rstudio,githubfun/rstudio,tbarrongh/rstudio,john-r-mcpherson/rstudio,suribes/rstudio,githubfun/rstudio,jzhu8803/rstudio,vbelakov/rstudio,vbelakov/rstudio,jar1karp/rstudio,piersharding/rstudio,jar1karp/rstudio,vbelakov/rstudio,JanMarvin/rstudio,thklaus/rstudio,piersharding/rstudio,JanMarvin/rstudio,suribes/rstudio