| add_special_chars | Add special characters to strings |
| add_whitespace | Add whitespaces |
| change_case | Change case |
| duplicate_rows | Duplicate rows and insert them into the dataframe in order or at random |
| make_missing | Make missing |
| messy | Messy |
| messy_colnames | Make column names messy |
| messy_datetime_formats | Make date(time) formats inconsistent |
| messy_datetime_tzones | Change the timezone of datetime columns |
| messy_date_formats | Make date(time) formats inconsistent |
| split_dates | Splits date(time) column(s) into multiple columns |
| split_datetimes | Splits date(time) column(s) into multiple columns |