Package com.fasterxml.jackson.databind.module

Package that contains classes and interfaces to help implement custom extension Modules (which are registered using ObjectMapper.registerModule(com.fasterxml.jackson.databind.Module).

Note that classes in the package only support registering handlers for non-generic types (types without type parameterization) -- hence "simple" -- which works for many cases, but not all. So if you will need to register handlers for generic types, you will usually need to either sub-class handlers, or implement/extend base types directly.