/usr/include/casacore/casa/IO/ is in casacore-dev 2.2.0-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/casacore/casa/IO/AipsIO.h
/usr/include/casacore/casa/IO/AipsIOCarray.h
/usr/include/casacore/casa/IO/AipsIOCarray.tcc
/usr/include/casacore/casa/IO/BaseSinkSource.h
/usr/include/casacore/casa/IO/BucketBase.h
/usr/include/casacore/casa/IO/BucketBuffered.h
/usr/include/casacore/casa/IO/BucketCache.h
/usr/include/casacore/casa/IO/BucketFile.h
/usr/include/casacore/casa/IO/BucketMapped.h
/usr/include/casacore/casa/IO/ByteIO.h
/usr/include/casacore/casa/IO/ByteSink.h
/usr/include/casacore/casa/IO/ByteSinkSource.h
/usr/include/casacore/casa/IO/ByteSource.h
/usr/include/casacore/casa/IO/CanonicalIO.h
/usr/include/casacore/casa/IO/ConversionIO.h
/usr/include/casacore/casa/IO/FileLocker.h
/usr/include/casacore/casa/IO/FilebufIO.h
/usr/include/casacore/casa/IO/FiledesIO.h
/usr/include/casacore/casa/IO/LECanonicalIO.h
/usr/include/casacore/casa/IO/LargeFilebufIO.h
/usr/include/casacore/casa/IO/LargeFiledesIO.h
/usr/include/casacore/casa/IO/LargeIOFuncDef.h
/usr/include/casacore/casa/IO/LargeRegularFileIO.h
/usr/include/casacore/casa/IO/LockFile.h
/usr/include/casacore/casa/IO/MFFileIO.h
/usr/include/casacore/casa/IO/MMapIO.h
/usr/include/casacore/casa/IO/MMapfdIO.h
/usr/include/casacore/casa/IO/MemoryIO.h
/usr/include/casacore/casa/IO/MultiFile.h
/usr/include/casacore/casa/IO/MultiFileBase.h
/usr/include/casacore/casa/IO/MultiHDF5.h
/usr/include/casacore/casa/IO/RawIO.h
/usr/include/casacore/casa/IO/RegularFileIO.h
/usr/include/casacore/casa/IO/StreamIO.h
/usr/include/casacore/casa/IO/TapeIO.h
/usr/include/casacore/casa/IO/TypeIO.h