docs: public ValueType getOperand(StackConsumer ins, ConstantPoolGen cpg, int i) throws DataflowAnalysisException {
          int numOperands = ins.consumeStack(cpg);
          if (numOperands == Const.UNPREDICTABLE) {
              throw new DataflowAnalysisException("Unpredictable stack consumption in " + ins);
          }
          return getStackValue((numOperands - 1) - i);
      }