code: function defineTasksForConfig(taskData) {
    // Define gulp tasks (build and optionally watch)
    // For the task name:
    // - single config, no 'name' key: <callback>
    // - single config, 'name' key: <callback>_<name>
    // - multiple configs, no 'name' key: <callback>_<index>
    const { callback, name, normalizedConfigs } = taskData
    normalizedConfigs.forEach((config, index) => {
      let taskId = name
      if (typeof config.name === 'string') {
        taskId += `_${config.name.trim()}`
      } else if (normalizedConfigs.length > 1) {
        taskId += `_${index + 1}`
      }
      const buildId = options.buildPrefix + taskId
      const watchId = options.watchPrefix + taskId
  
      // Register build task
      gulp.task(buildId, done => {
        return callback(config, {
          done: done,
          catchErrors: catchErrors,
          showError: showError,
          showSizes: showSizes,
          simpleStream: simpleStream
        })
      })
  
      // Register matching watch task
      if (Array.isArray(config.watch) && config.watch.length > 0) {
        gulp.task(watchId, () => {
          return gulp.watch(config.watch, gulp.series(buildId))
        })
      }
    })
  }
docs: Register matching 'build' and 'watch' gulp tasks
  @param {object} taskData