Java library for RFC 9457 Problems with support for standard problem types of the Belgif REST guide (https://www.belgif.be/specification/rest/api-guide/#error-handling)
The approach is to evaluate the setter methods as pure setters and the 'add' methods as methods to add input (or in, name, value) to what already exist.
The goal of this PR is to solve #77
The approach is to evaluate the setter methods as pure setters and the 'add' methods as methods to add input (or in, name, value) to what already exist.