@Override
	public A getAssembler(AssemblySelector selector) {
		checkGenerateAssembler();
		return newAssembler(selector);
	}
Do the actual work to construct an assembler from a SLEIGH language

@throws SleighException if there's an issue accessing the language
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/app/plugin/assembler/sleigh/AbstractSleighAssemblerBuilder.java