/usr/include/sbml/packages/comp/ is in libsbml5-dev 5.10.0+dfsg-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/sbml/packages/comp/common/
/usr/include/sbml/packages/comp/common/CompExtensionTypes.h
/usr/include/sbml/packages/comp/common/compfwd.h
/usr/include/sbml/packages/comp/extension/
/usr/include/sbml/packages/comp/extension/CompExtension.h
/usr/include/sbml/packages/comp/extension/CompModelPlugin.h
/usr/include/sbml/packages/comp/extension/CompSBMLDocumentPlugin.h
/usr/include/sbml/packages/comp/extension/CompSBasePlugin.h
/usr/include/sbml/packages/comp/sbml/
/usr/include/sbml/packages/comp/sbml/CompBase.h
/usr/include/sbml/packages/comp/sbml/Deletion.h
/usr/include/sbml/packages/comp/sbml/ExternalModelDefinition.h
/usr/include/sbml/packages/comp/sbml/ListOfDeletions.h
/usr/include/sbml/packages/comp/sbml/ListOfExternalModelDefinitions.h
/usr/include/sbml/packages/comp/sbml/ListOfModelDefinitions.h
/usr/include/sbml/packages/comp/sbml/ListOfPorts.h
/usr/include/sbml/packages/comp/sbml/ListOfReplacedElements.h
/usr/include/sbml/packages/comp/sbml/ListOfSubmodels.h
/usr/include/sbml/packages/comp/sbml/ModelDefinition.h
/usr/include/sbml/packages/comp/sbml/Port.h
/usr/include/sbml/packages/comp/sbml/ReplacedBy.h
/usr/include/sbml/packages/comp/sbml/ReplacedElement.h
/usr/include/sbml/packages/comp/sbml/Replacing.h
/usr/include/sbml/packages/comp/sbml/SBaseRef.h
/usr/include/sbml/packages/comp/sbml/Submodel.h
/usr/include/sbml/packages/comp/util/
/usr/include/sbml/packages/comp/util/CompFlatteningConverter.h
/usr/include/sbml/packages/comp/util/SBMLFileResolver.h
/usr/include/sbml/packages/comp/util/SBMLResolver.h
/usr/include/sbml/packages/comp/util/SBMLResolverRegistry.h
/usr/include/sbml/packages/comp/util/SBMLUri.h
/usr/include/sbml/packages/comp/validator/
/usr/include/sbml/packages/comp/validator/CompConsistencyValidator.h
/usr/include/sbml/packages/comp/validator/CompIdentifierConsistencyValidator.h
/usr/include/sbml/packages/comp/validator/CompSBMLError.h
/usr/include/sbml/packages/comp/validator/CompSBMLErrorTable.h
/usr/include/sbml/packages/comp/validator/CompUnitConsistencyValidator.h
/usr/include/sbml/packages/comp/validator/CompValidator.h
/usr/include/sbml/packages/comp/validator/constraints/
/usr/include/sbml/packages/comp/validator/constraints/ClassReplacements.h
/usr/include/sbml/packages/comp/validator/constraints/CompIdBase.h
/usr/include/sbml/packages/comp/validator/constraints/ExtModelReferenceCycles.h
/usr/include/sbml/packages/comp/validator/constraints/PackageIdReplacementCheck.h
/usr/include/sbml/packages/comp/validator/constraints/SubmodelReferenceCycles.h
/usr/include/sbml/packages/comp/validator/constraints/UniqueCompIdBase.h
/usr/include/sbml/packages/comp/validator/constraints/UniqueComponentIds.h
/usr/include/sbml/packages/comp/validator/constraints/UniqueModelIds.h
/usr/include/sbml/packages/comp/validator/constraints/UniquePortIds.h
/usr/include/sbml/packages/comp/validator/constraints/UniquePortReferences.h
/usr/include/sbml/packages/comp/validator/constraints/UniqueReplacedReferences.h
/usr/include/sbml/packages/comp/validator/constraints/UnitReplacementCheck.h