public char peek() {
		try {
			return string.charAt(index);
		}
		catch (IndexOutOfBoundsException e) {
			return DONE;
		}
	}
Returns the next character without incrementing the current index. 
@return the next character without incrementing the current index
Ghidra/Features/Base/src/main/java/ghidra/app/util/demangler/CharacterIterator.java