public String nextString(int len) {
		String s = string.substring(index, index + len);
		index = index + len;
		return s;
	}
Returns the next ascii string of the specified length starting
at the current index.
@param len the length of the string to read
@return the next ascii string
Ghidra/Features/Base/src/main/java/ghidra/app/util/demangler/CharacterIterator.java