/etc/apache2/mods-available/proxy_wstunnel.load is in apache2 2.4.18-2ubuntu3.8.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | # Depends: proxy
LoadModule proxy_wstunnel_module /usr/lib/apache2/modules/mod_proxy_wstunnel.so
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