/usr/src/WrapITK/ConfigurationInputs/wrap_ITKLang.cxx.in is in libinsighttoolkit3-dev 3.20.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | #define ITK_WRAP_PACKAGE "@CONFIG_MODULE_NAME@@CONFIG_LANGUAGE@"
#define ITK_@CONFIG_UPPER_LANG@_WRAP
#include "wrap_@CONFIG_MODULE_NAME@.cxx"
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