libxfixes-dev 1:6.0.0-2 (amd64 binary) in ubuntu lunar

 libXfixes provides an X Window System client interface to the 'XFIXES'
 extension to the X protocol.
 .
 It provides support for Region types, and some cursor functions.
 .
 This package contains the development headers for the library found in
 libxfixes3. Non-developers likely have little use for this package.
 .
 More information about X.Org can be found at:
 <URL:https://www.X.org>
 .
 This module can be found at
 git://anongit.freedesktop.org/git/xorg/lib/libXfixes