It references the function return type: Colored = Promise<T> Colorless = T In "colorless" async/await, async functions are implicit (no async keyword), and w

It references the function return type: Colored = Promise<T> Colorless = T In "colorless" async/await, async functions are implicit (no async keyword), and when called, the compiler auto-unwraps the promise, so everything looks like "sync" code but any function stack could "save and resume" at an "async point".