This file is indexed.

/usr/include/NTL/vec_vec_ZZ.h is in libntl-dev 10.5.0-2.

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#ifndef NTL_vec_vec_ZZ__H
#define NTL_vec_vec_ZZ__H

#include <NTL/vec_ZZ.h>

NTL_OPEN_NNS

typedef Vec< Vec<ZZ> > vec_vec_ZZ;

NTL_CLOSE_NNS

#endif