In today’s article, we will talk about the Extract Interface refactoring, a new refactoring available since GoLand 2019.1. This refactoring allows us to take a type and extract all the method definitions that we need, then create a new interface from them. This operation is particularly useful when going from a single implementation to using multiple implementations, such as in the example below. To invoke this, you can use the Refactor This shortcut, Ctrl+Alt+Shift+T on Windows/Linux or ^T on macOS. The Extract Interface dialog allows us to select any method from the existing typ