public long parseLong() throws PdbException {
		checkLimit(8);
		byte[] selectedBytes = Arrays.copyOfRange(bytes, index, index + 8);
		index += 8;
		return LittleEndianDataConverter.INSTANCE.getLong(selectedBytes);
	}
Parses and returns a (64-bit) long from the PdbByteReader.
@return The integer parsed.
@throws PdbException Upon not enough data left to parse.
Ghidra/Features/PDB/src/main/java/ghidra/app/util/bin/format/pdb2/pdbreader/PdbByteReader.java