Extraction is all about giving names, and I often need to change the names as I learn. Change Function Declaration (124) changes names of functions; I also use that refactoring to add or remove a function’s arguments. For variables, I use Rename Variable (137), which relies on Encapsulate Variable (132). When changing function arguments, I often find it useful to combine a common clump of arguments into a single object with Introduce Parameter Object (140).
