Simplify UserDefinedBuilder#type_info
Implement ObjectBase.object_class
Modernize tests for ObjectBuilder
Refactor UserDefinedBuilder#type_info
Start implementing installation of vfunc implementations
Use autotest again
Make sure UserDefinedTypeInfo is available
Clean up tests for UserDefinedBuilder
Start implementing VFuncBuilder
Add a FIXME
Make sure GirFFI is prepard when running sized array test stand-alone
Wrap vfunc implementations in an argument mapper
Add passing integration test for GIMarshallingTests::Object#int8_in
Add passing test for GIMarshallingTests::Object#method_int8_in
Add passing test for GIMarshallingTests::Object#vfunc_return_value_only
Fix typo