title: Call a getter of different javascript file using string
body: <p>In my automation code,I have two javascript file having different class and some getters.
  I get some input from user and depending on that input, i create the name of getter during runtime and access the getter of both classes.</p>
  
  <p>I am able to access the getter of same class but i am facing issue while accessing the getter of different class.</p>
  
  <pre><code>const AutomationClass2 = require('./AutomationClass2.js')
  class AutomationClass1 extends Page {
    get GeneralTile() {
      return browser.isAndroid ? $(~abc) :$(~abc)
    }
  
    navigateLandingPage(page, tab) { 
      if (tab == "tab") {
         //page=zones, tab=tab
        var lObj = page+ "Tab"          //facing issue while accessing the getter of "AutomationClass2"
        AutomationClass2.lObj.waitForExist(20000)     //facing issue
        AutomationClass2.lObj.click()                 //facing issue
      }
      else if (tab == "zone") {
        //page=General
        var lObj = page+ "Tile"         //GeneralTile
        this[lObj].waitForExist(20000)  //working fine
        this[lObj].click()              //working fine
      }
    }
  }
  </code></pre>
  
  <p>AutomationClass2 looks like</p>
  
  <pre><code>class SettingGeneral extends Page {
    /**
     * define elements
     */
  
  
    get zonesTab() {
      console.log("in zones tab getter ")
      const elem = browser.isAndroid ? $('~TabZones') : $('~TabZones')
      return elem
    }
    }
  
  </code></pre>
  
  <p>In first if i.e "if (tab == "tab") {"
  I am not able to access the getter "zonesTab" of class "AutomationClass2"
  Thanks in Advance,It will be great help</p>