Codebase Conundrum

As a senior C++ developer with GTK experience, you are hired to perform essential steps in the GTK4 migration for Inkscape. However, the migration is riddled with complicated programming puzzles that must be solved in order to complete the migration quickly, but accurately. Work together with the Inkscape expert and multiple senior Inkscape developers to solve the codebase conundrum and save Inkscape from facing conflicts.