/usr/share/gnome-applets/ui/gweather-applet-menu.xml is in gnome-applets-data 3.4.1-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | <menuitem name="Item 1" action="Details" />
<menuitem name="Item 2" action="Update" />
<separator/>
<menuitem name="Item 3" action="Props" />
<menuitem name="Item 4" action="Help" />
<menuitem name="Item 5" action="About" />
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