If this value is nil, files are saved in the current directory. If the value
is a valid directory, then it overrides `semanticdb-default-file-name' and
stores caches in a coded file name in this directory."
If this value is nil, files are saved in the current directory. If the value
is a valid directory, then it overrides `semanticdb-default-file-name' and
stores caches in a coded file name in this directory."