PyQt6 Missing Layout Size Constraint Flags

[Elguavas]

hi there, just converting some pyqt5 code to pyqt6, so far so good, but:

self.layout.setSizeConstraint(QLayout.SetFixedSize)

fails becuse there is no flag in QLayout called SetFixedSize. neither do 
the other size constraint flags seem to be available.

i've tried looking for one of those QLayout.SOMETHING_FLAGS.whatever 
constants in QLayout, that pyqt6 now seems to be using, but i can't find 
any way to get the needed flag value constants.

what am i missing here?

thanks. ;)