public AssemblySymbol getNext() {
		if (completed()) {
			return null;
		}
		return prod.getRHS().getSymbol(pos);
	}
Get the symbol immediately to the right of the dot

<p>
This is the symbol which must be matched to advance the dot.

@return the symbol, or null if the item is completed, i.e., the dot is at the far right
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/app/plugin/assembler/sleigh/parse/AssemblyParseStateItem.java