libx11-6 - 2:1.6.7-1+deb10u2 main

This package provides a client interface to the X Window System, otherwise
known as 'Xlib'. It provides a complete API for the basic functions of the
window system.
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More information about X.Org can be found at:

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This module can be found at
git://anongit.freedesktop.org/git/xorg/lib/libX11