For easier customization, the formatting of a tibble is split
into three components: header, body, and footer.
The tbl_format_header()
method is responsible for formatting the header
of a tibble.
Override this method if you need to change the appearance
of the entire header.
If you only need to change or extend the components shown in the header,
override or extend tbl_sum()
for your class which is called by the
default method.
Arguments
- x
A tibble-like object.
- setup
A setup object returned from
tbl_format_setup()
.- ...
These dots are for future extensions and must be empty.