The custom format string to display for the value.
For more information on number formats, see Format Numbers and Null Values.
When the custom format string is used for numbers, other formatting options are ignored.
For information on formatting dates, see Custom Date Formats.
The custom format string is always used for dates and the other formatting options do not apply (except for the formatType and locale).
Since
1.16.0 Formatting options for a number or date column