R/read_sheet_then_save_csv.R
    read_all_xlsx_then_save_csv.RdFollowing the same principle of read_all_sheets_then_save_csv
read_all_xlsx_then_save_csv() just loop read_all_sheets_then_save_csv() over
all available xlsx files
read_all_xlsx_then_save_csv(path_to_xlsx)a character vector with the path to excel file
if (FALSE) {
# read and into a csv
xlsx_dir <- system.file("xlsx-examples", package = "misc")
read_all_xlsx_then_save_csv(
  path_to_xlsx = xlsx_dir
)
}