public int getRTTINumber() {
		if (specialName != null) {
			return specialName.getRTTINumber();
		}
		return -1;
	}
Returns the RTTI number:{0-4, or -1 if not an RTTI}
@return int RTTI number:{0-4, or -1 if not an RTTI}
Ghidra/Features/MicrosoftDmang/src/main/java/mdemangler/naming/MDBasicName.java