gresource list /path/to/filename.gresource | grep <resource-name>

gresource list /path/to/filename.gresource | grep checkbox-off.svg

gresource extract /path/to/filename.gresource /path/to/resource

gresource extract /path/to/filename.gresource /org/gnome/shell/theme/checkbox-off.svg

url("resource:///path/to/resource");

url("resource:///org/gnome/shell/theme/checkbox-off.svg");

sudo apt-get install dconf-editor

dconf-editor