Schema for any type leads to error in generated client

[kiwi-oss]

Generation of a client from a specification that uses a schema for any type according to the OpenAPI documentation leads to the following error:

private oas_any_type_not_mapped foo = null;
	        ^
  symbol:   class oas_any_type_not_mapped
  location: class Bar

Object would be the type I'd expect to be generated for that schema.