This file is indexed.

preinst is in libswt-gtk-3-java 3.8.2-3.

This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.

The actual contents of the file can be viewed below.

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#! /bin/sh
set -e

case "$1" in
    install|upgrade)
        if update-alternatives --list swt.jar >/dev/null 2>&1 ; then
		update-alternatives --remove-all swt.jar
        fi
	;;
    *)
        echo "prerm called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac



exit 0