How to use the @webpack-blocks/core.group function in @webpack-blocks/core

/**
 * Webpack base config block.
 *
 * @see https://webpack.github.io/docs/configuration.html
 */

const assert = require('assert-plus')
const common = require('@webpack-blocks/webpack-common')
const core = require('@webpack-blocks/core')
const webpack = require('webpack')

const webpackVersion = common.parseVersion(require('webpack/package.json').version)

exports.env = core.env
exports.group = core.group
exports.webpack = webpack

exports.createConfig = createConfig
exports.createConfig.vanilla = createVanillaConfig

exports.addPlugins = common.addPlugins
exports.customConfig = common.customConfig
exports.defineConstants = common.defineConstants
exports.entryPoint = common.entryPoint
exports.performance = common.performance
exports.resolveAliases = common.resolveAliases
exports.setContext = common.setContext
exports.setDevTool = common.setDevTool
exports.setOutput = common.setOutput
exports.sourceMaps = common.sourceMaps

/**
 * Webpack base config block.
 *
 * @see https://webpack.github.io/docs/configuration.html
 */

const core = require('@webpack-blocks/core')
const webpack = require('webpack')
const webpackMerge = require('webpack-merge')
const path = require('path')
const parseVersion = require('./lib/parseVersion')

const webpackVersion = parseVersion(require('webpack/package.json').version)

exports.env = core.env
exports.group = core.group
exports.match = core.match
exports.when = core.when

exports.createConfig = createConfig

exports.setMode = setMode
exports.addPlugins = addPlugins
exports.customConfig = customConfig
exports.defineConstants = require('./lib/defineConstants')
exports.setEnv = require('./lib/setEnv')
exports.entryPoint = entryPoint
exports.performance = performance
exports.optimization = optimization
exports.resolve = resolve
exports.setContext = setContext
exports.setDevTool = setDevTool