Some functions are not automatically detected by Qt Creator hence there's no editing function such as showing candidates or highlighting.

• Happens with Qt Creator at least between v4.13 - v4.14.
• Happens with Qt5.15 series kit but not with Qt5.12 series
• Appears when Clang Code model is OFF

*How to reproduce *
Use 4000Chips Qt Sample (https://doc.qt.io/qt-5/qtwidgets-graphicsview-chip-example.html).
Select Qt5.15.x as the kit

See the attached screenshots as a reference.
The functions in the constructor such as setZValue or setFlags are not detected with Qt5.15.2 kit while they are with Qt5.12.9 kit.

Qt5.15.2

Qt5.12.9