As a senior C++ developer with gtkmm experience, you have been recruited to take on the essential steps of the GTK4 migration for Inkscape. You will work closely with an Inkscape expert to ensure that the C++ bindings are adequate and that the migration is performed as quickly as possible. But be warned, the migration is a complex endeavor and will change hundreds of files in Inkscape's codebase. Your skills and expertise will be put to the test.