public boolean isString() {
		if (specialName != null) {
			return specialName.isString();
		}
		return false;
	}
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