如何在React Apexcharts中添加每个系列的条形之间的间隙？

import React from 'react';
import ApexCharts from 'apexcharts';
import ReactApexChart from 'react-apexcharts';

constructor(props) {
  super(props);

  this.state = {
    options: {
      chart: {
        type: 'bar',
        stacked: true,
        toolbar: {
          show: false
        }
      },
      plotOptions: {
        bar: {
          horizontal: false,
          columnWidth: '50%', // 设置每个系列的条形宽度
          endingShape: 'flat' // 设置条形的形状
        },
      },
      xaxis: {
        categories: ['Category 1', 'Category 2', 'Category 3', 'Category 4', 'Category 5']
      },
      yaxis: {
        title: {
          text: 'Value'
        }
      },
      fill: {
        opacity: 1
      },
      legend: {
        position: 'top'
      }
    },
    series: [
      {
        name: 'Series 1',
        data: [44, 55, 41, 67, 22]
      },
      {
        name: 'Series 2',
        data: [13, 23, 20, 8, 13]
      },
      {
        name: 'Series 3',
        data: [11, 17, 15, 15, 21]
      },
      {
        name: 'Series 4',
        data: [21, 7, 25, 13, 22]
      }
    ]
  };
}

render() {
  return (
    <div>
      <ReactApexChart options={this.state.options} series={this.state.series} type="bar" height={350} />
    </div>
  );
}