text: let fs = require('fs')
  let path = require('path')
  
  module.exports = { 
    isUndefined: function isUndefined(variable) {
      return typeof variable === typeof undefined
    },
  
    allStrategyNames: function allStrategyNames() {
      let pathName = path.resolve(__dirname, '..', '..', 'extensions', 'strategies')
      return fs.readdirSync(pathName).filter(function (file) {
        return fs.statSync(pathName + '/' + file).isDirectory()
      })
    }
  }