protected static SleighLanguage assertSleigh(Language language) {
		if (!(language instanceof SleighLanguage)) {
			throw new IllegalArgumentException("Emulation requires a sleigh language");
		}
		return (SleighLanguage) language;
	}
Check and cast the language to Sleigh

<p>
Sleigh is currently the only realization, but this should give a decent error should that
ever change.

@param language the language
@return the same language, cast to Sleigh
Ghidra/Framework/Emulation/src/main/java/ghidra/pcode/emu/AbstractPcodeMachine.java