@Override
	protected AssemblyExtendedProduction newProduction(AssemblyExtendedNonTerminal lhs,
			AssemblySentential<AssemblyExtendedNonTerminal> rhs) {
		throw new UnsupportedOperationException("Please construct extended productions yourself");
	}
Defines an "extended" grammar

<p>
"Extended grammar" as in a grammar extended with state numbers from an LR0 parser. See
<a href="http://web.cs.dal.ca/~sjackson/lalr1.html">LALR(1) Parsing</a> from Stephen Jackson of
Dalhousie University, Halifax, Nova Scotia, Canada.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/app/plugin/assembler/sleigh/grammars/AssemblyExtendedGrammar.java