depend on 'methods' to avoid weird S3 inheritance checking bug
depend on 'methods' to avoid weird S3 inheritance checking bug

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