CollectConstructorFieldsFromAST collects fields to include in a constructor from the AST.

CollectInitFuncReturnTypes collects the return types of the init function.

AllArgsConstructorGenerator is a struct type that has the responsibility to generate a statement of a constructor with all of arguments.

BuilderGenerator is a struct type that has the responsibility to generate a statement of a builder.

Field represents a field of the structure for a constructor to be generated.

Generator is an interface that has the responsibility to generate a constructor code.