private VirtualFunctionTableEntry existing(int tableIndex) throws PdbException {
		VirtualFunctionTableEntry entry = entry(tableIndex);
		if (entry == null) {
			throw new PdbException(
				"No entry in Virtual Function Table for table offset: " + tableIndex);
		}
		return entry;
	}
Returns the mangled name
@return the mangled name
Ghidra/Features/PDB/src/main/java/ghidra/app/util/pdb/classtype/ProgramVirtualFunctionTable.java