One aspect of game development in general (and inventories as our particular examples in this chapter) is the distinction about when we undertake an activity. Runtime is when the game is running (and when all our software and UI choices take effect). However, design-time is the time when different members of our game design team work on constructing a wide range of game components, including the scripts, audio and visual assets, and the process of constructing each game level (or scene in Unity-speak).
Unity's Editor extensions are scripting and multimedia components that enable a game software engineer to make design-time work easier and less likely to introduce errors. Editor extensions allow workflow improvements, thus allowing designers to achieve their goals quicker and more easily; for example, removing the need for any scripting knowledge when generating...