This file is indexed.

/usr/share/polkit-1/rules.d/60-network-manager.rules is in network-manager 1.6.2-3+deb9u2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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polkit.addRule(function(action, subject) {
  if (action.id == "org.freedesktop.NetworkManager.settings.modify.system" &&
	subject.local && subject.active && 
	(subject.isInGroup ("sudo") || subject.isInGroup ("netdev"))) {
    return polkit.Result.YES;
  }
});