@Override
		public boolean hasValue(Register register) {
			if (originalContext != null) {
				return originalContext.hasValue(register);
			}
			RegisterValue registerValue = programContext.getRegisterValue(register, address);
			return registerValue != null && registerValue.hasValue();
		}
Get the byte value mask corresponding to the specified operand.
@param opIndex operand index within the instruction representation
@return byte mask or null if operand does not have a corresponding sub-constructor or attach
@throws IllegalStateException if prototype parse failed
@throws IndexOutOfBoundsException if opIndex is not a valid operand index
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/app/plugin/processors/sleigh/SleighDebugLogger.java