RegisterValue getOriginalPrototypeContext(InstructionPrototype prototype,
			Register baseContextReg) throws NoValueException {
		try {
			DBRecord record = contextTable.getRecord(protoHt.get(prototype));
			if (record != null) {
				String s = record.getString(0);
				BigInteger value = s != null ? new BigInteger(s) : BigInteger.ZERO;
				return new RegisterValue(baseContextReg, value);
			}
		}
		catch (IOException e) {
			program.dbError(e);
		}
		return null;
	}
Get the prototype with the given ID.
@param protoID prototype ID
@return instruction prototype or null if not found
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/code/PrototypeManager.java