.SearchType property of SearchDescriptor object: Documentation?

SearchDescriptor objects: Property .SearchType
Where are the accepted values and their meaning documented?

Look:

And:

https://opengrok.libreoffice.org/xref/core/include/svl/srchitem.hxx?r=c60a9db1&fi=SvxSearchCellType#SvxSearchCellType

Thank you.
See also tdf# 162783.