public String getUniqueDirName() {
		return getUniqueName() + Integer.toUnsignedString(pdbIdentifiers.getAge(), 16);
	}
Returns a string that is a combination of the GUID/ID and the age, in a format
used by symbol servers to create subdirectories in their directory structure.

@return String combination of GUID/ID and age, e.g. "112233441"
Ghidra/Features/PDB/src/main/java/pdb/symbolserver/SymbolFileInfo.java