/usr/bin/heka2itx is in biosig-tools 0.96.3+svn2677-2.1build1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 | #!/bin/sh
#conversion from HEKA DAT2 to ITX format format
save2gdf -f=ITX $1 $2 $3 $4 $5 $6 $7
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