public long parseUnsignedIntVal() throws PdbException {
		checkLimit(4);
		byte[] selectedBytes = Arrays.copyOfRange(bytes, index, index + 4);
		selectedBytes = Arrays.copyOf(selectedBytes, 8);
		index += 4;
		return LittleEndianDataConverter.INSTANCE.getLong(selectedBytes);
	}
Parses an unsigned int from the PdbByteReader and returns its positive long value.
@return The positive long value of the parsed unsigned int.
@throws PdbException Upon not enough data left to parse.
Ghidra/Features/PDB/src/main/java/ghidra/app/util/bin/format/pdb2/pdbreader/PdbByteReader.java