protected AssemblyNonTerminal getOrCreateWildNonTerminal(AssemblySymbol s) {
		return wildNTs.computeIfAbsent(s, this::createWildNonTerminal);
	}
Exclude string terminals. These should be purely syntactic elements. Use of them as fixed
literals, e.g., 1 or RAX, is an error on the spec's part.
Ghidra/Features/WildcardAssembler/src/main/java/ghidra/asm/wild/WildSleighAssemblerBuilder.java