anchor.diff:  
   let mutable driver : AndroidDriver<IWebElement> = null
   let mutable localService : AppiumLocalService = null
  +let logFile = "./temp/AppiumLog.txt"
   
   //configuration
   let mutable waitTimeout = 10.0
  
positive.code: /// Starts appium as local service
  let startAppium() =
      if localService = null then
          let builder = AppiumServiceBuilder().WithLogFile(new System.IO.FileInfo("Log"));
          localService <- builder.Build()
      if not localService.IsRunning then
          localService.Start()
  
negative.code: module canopy.mobile
  
  open System
  open System.IO
  open OpenQA.Selenium
  open OpenQA.Selenium.Remote
  open OpenQA.Selenium.Appium
  