pub fn heading(category: Category) -> Option<&'static str>Expand description
The heading a category’s changes are grouped under in the text report, or
None for a category listed plainly. One heading exists: “compatible on
the wire, visible in source”, for a change that exits 0 but that a
consumer sees in its source — an interface renamed on its number changes
the generated identity-table names in both wire backends, and an interface
leaving a service’s set stops the service.member addresses of that
interface resolving under the service. Each such category’s --explain
text states its own consequence; the JSON report carries the category word
and no heading field.
Wildcard arms are denied for the reason category_word gives.