public Address getFlowRefAddr() {
		if (refAddr == null) {
			throw new SleighException("Flow reference (inst_ref) is undefined at " + getAddr());
		}
		return refAddr;
	}
Get bits from context into an int
@param startbit is the index of the first bit to fetch
@param bitsize number of bits (range: 1 - 32)
@return the packed bits
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/app/plugin/processors/sleigh/SleighParserContext.java