Number of row in a table. This function is not "group aware" it returns the total number of rows, not rows per dplyr group.
replyr_nrow depends on data being returned to count, so some corner cases (such as zero columns) will count as zero rows.
In particular work around dplyr issue 2871 https://github.com/tidyverse/dplyr/issues/2871.
tbl or item that can be coerced into such.
number of rows
#>  2