public char getAndIncrement() {
		debugCheck(0);
		return iter.getAndIncrement();
	}
Returns the character at the current index and then increments the index
by one. If the resulting index is greater or equal to the end index, the
current index is reset to the end index and a value of DONE is returned.

@return the character at the new position or DONE
Ghidra/Features/MicrosoftDmang/src/main/java/mdemangler/MDMang.java