use the same implemetnation as the config package for merging lists
use the same implemetnation as the config package for merging lists

kevinykuo/sparklyr,kevinykuo/sparklyr,kevinykuo/sparklyr,kevinykuo/sparklyr,rstudio/sparklyr,rstudio/sparklyr,rstudio/sparklyr,rstudio/sparklyr