Warnings about impure methods

[sdether]

I'm storing my World instance as a readonly field in some classes and when I access the world, JetBrains Rider annotates the calls with Possibly impure struct method called on readonly variable: struct value always copied before invocation.

I'm assuming all the methods are pure in the sense that they don't actually change the World struct. As far as I can tell World only has a single member and its' a pointer to the native world, so any mutation is happening in the native Flecs code. But I wanted to make sure.

[BeanCheeseBurrito]

None of the world methods modify the World struct, except for World.Dispose() and World.Reset(). In the next release I'll change the World struct to be readonly and get rid of any code that modifies the world handle.