code: private void simulateSizeChange(final SizeChangingInstruction instruction) {
          IntStream.range(0, instruction.getNumberOfPops()).forEach(i -> runtimeStack.pop());
          IntStream.range(0, instruction.getNumberOfPushes()).forEach(i -> runtimeStack.push(new Element()));
      }
docs: Simulates the size change instruction.
  
  @param instruction The instruction to simulate