Access the RStudio API (if available) and provide informative error messages when it's not.
copied from cf-staging / r-rstudioapiconda install conda-forge::r-rstudioapi
conda install conda-forge/label/cf201901::r-rstudioapi
conda install conda-forge/label/cf202003::r-rstudioapi
conda install conda-forge/label/gcc7::r-rstudioapi