ModuleMixins
Documentation for ModuleMixins.
ModuleMixins is a way of composing families of struct definitions on a module level. Suppose we have several modules that contain structs of the same name. We can compose these modules such that all the structs they have in common are merged. Methods that work on one component should now work on the composed type.
Most problems with object type abstraction can be solved in Julia by cleverly using abstract types and multiple dispatch. Use ModuleMixins only after you have convinced yourself you absolutely need it.