public String getUniqueName() {
		return (pdbIdentifiers.getGuid() != null)
				? pdbIdentifiers.getGuid().toString().replace("-", "").toUpperCase()
				: String.format("%08X", pdbIdentifiers.getSignature());

	}
A string that represents the unique fingerprint of a Pdb file.  Does not
include the age.

@return either GUID str or signature hexstring
Ghidra/Features/PDB/src/main/java/pdb/symbolserver/SymbolFileInfo.java