/usr/share/octave/ is in libsbml5-octave 5.12.0+dfsg-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/octave/site/
/usr/share/octave/site/m/
/usr/share/octave/site/m/libsbml5/
/usr/share/octave/site/m/libsbml5/CheckAndConvert.m
/usr/share/octave/site/m/libsbml5/Contents.m
/usr/share/octave/site/m/libsbml5/ConvertFormulaToMathML.m
/usr/share/octave/site/m/libsbml5/OutputSBML.m
/usr/share/octave/site/m/libsbml5/TranslateSBML.m
/usr/share/octave/site/m/libsbml5/buildSBML.m
/usr/share/octave/site/m/libsbml5/installSBML.m
/usr/share/octave/site/m/libsbml5/isFbcEnabled.m
/usr/share/octave/site/m/libsbml5/isSBML_Model.m
/usr/share/octave/site/m/libsbml5/isoctave.m