Maintainers for libgtksourceview-4-dev are Debian GNOME Maintainers <[email protected]>.
You may want to refer to the following packages that are part of the same source: gir1.2-gtksource-4, libgtksourceview-4-0, libgtksourceview-4-common, libgtksourceview-4-doc, libgtksourceview-4-tests.
You might like to refer to the libgtksourceview-4-dev package page, to the Package Tracking System, or to the source package src:gtksourceview4's bug page.
If you find a bug not listed here, please report it.