constParameterReference
ftp://ftp.de.debian.org/debian/pool/main/g/gtk2-engines-oxygen/gtk2-engines-oxygen_1.4.6.orig.tar.bz2
2.18.0 oxygen-gtk2-1.4.6/src/oxygenstyle.cpp:3893:54: style: Parameter 'context' can be declared as reference to const [constParameterReference]
2.18.0 oxygen-gtk2-1.4.6/src/oxygenstyle.h:143:96: style: Parameter 'options' can be declared as reference to const [constParameterReference]