For input parameters that are objects, we can declare them as readonly so the callee can pass either variable or constant structures.
Without this, only mutable strucrures can be passsed here because we don't sey "hey, we won't modify your input parameters" explicitly
For input parameters that are objects, we can declare them as readonly so the callee can pass either variable or constant structures. Without this, only mutable strucrures can be passsed here because we don't sey "hey, we won't modify your input parameters" explicitly