/usr/share/doc/iwidgets4-doc/demos/radiobox is in iwidgets4-doc 4.0.1-6.
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 7 8 9 10 11 12 13 14 | # ----------------------------------------------------------------------
# DEMO: radiobox in [incr Widgets]
# ----------------------------------------------------------------------
package require Iwidgets 4.0
iwidgets::radiobox .rb -labeltext "Size:" -labelpos nw
pack .rb -padx 4 -pady 4 -fill both
.rb add small -text "Small"
.rb add med -text "Medium"
.rb add large -text "Large"
.rb add xlarge -text "Biggie"
.rb select med
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