Qt Creator IDE doesn't suggest the methods

[hunger]

You don't need to upgrade the Qt libraries, just Qt Creator.

Unfortunately Creator is not very good with templates, so upgrading Creator will not help here

There is work ongoing to finally fix this by using a clang-based c++ parser. While that fixes this issue it is unfortunately too slow for now (it can not take the shortcuts the current parser takes which e.g. break most templates). So we need to come up with some way to cache the code model data in some way or another or speed up clang for the use-case of Qt Creator.