old_contents: const electron = require('electron');
  const session = require('electron').session;
  if(require('electron-squirrel-startup')) return;
  
  // Module to control application life.
  const {app} = electron
  // Module to create native browser window.
  const {BrowserWindow} = electron;
  
  // Keep a global reference of the window object, if you don't, the window will
  // be closed automatically when the JavaScript object is garbage collected.
  let win;
  
  function createWindow() {
      // Create the browser window.
      win = new BrowserWindow({
      width: 800,
  	height: 600,
      'min-width': 600,
      'min-height': 300,
      'accept-first-mouse': true,
      'title-bar-style': 'hidden',
      'webPreferences': {'session': session},
      show: false
      });
  
      // and load the index.html of the app.
      win.loadURL(`file:${__dirname}/app/views/index.html`);
  
      //loading window gracefully
      win.once('ready-to-show', () => {
  	// Open the DevTools.
  	win.webContents.openDevTools();	
  	win.maximize();
          win.show();
      });
  
      // Emitted when the window is closed.
      win.on('closed', () => {
      // Dereference the window object, usually you would store windows
      // in an array if your app supports multi windows, this is the time
      // when you should delete the corresponding element.
  	win = null;
  	if (process.platform !== 'darwin') {
  	    app.quit();
  	}
      });
  }
  
  var dbSetup = new Promise(
      function (resolve, reject) {
  	// Setup database.
  	var dbUtil = require(`${__dirname}/app/util/DbUtil.js`);
  	dbUtil.setupTargetDb
  	    .then((response) => {
  		console.log(response);
  		return dbUtil.setupRefDb;
  	    })
  	    .then((response) => {
  		console.log(response);
          return dbUtil.setupLookupsDb;
  	    })
          .then((response)=>{
              console.log(response)
              resolve(response)
          })
          .catch((err) => {
  		console.log('Error while DB setup. ' + err);
  		reject(err);
  	    });
      });
  
  function preProcess() {
      dbSetup
  	.then((response) => {
  	    createWindow();
  	})
  	.catch((err) => {
  	    console.log('Error while App intialization.' + err);
  	});
  }
  
  // This method will be called when Electron has finished
  // initialization and is ready to create browser windows.
  // Some APIs can only be used after this event occurs.
  app.on('ready', preProcess);
  
  
  // Quit when all windows are closed.
  app.on('window-all-closed', () => {
      // On OS X it is common for applications and their menu bar
      // to stay active until the user quits explicitly with Cmd + Q
      if (process.platform !== 'darwin') {
      app.quit();
      }
  });
  
  app.on('activate', () => {
      // On OS X it's common to re-create a window in the app when the
      // dock icon is clicked and there are no other windows open.
      if (win === null) {
      createWindow();
      }
  });
  
  
new_contents: const electron = require('electron');
  const session = require('electron').session;
  if(require('electron-squirrel-startup')) return;
  
  // Module to control application life.
  const {app} = electron
  // Module to create native browser window.
  const {BrowserWindow} = electron;
  
  // Keep a global reference of the window object, if you don't, the window will
  // be closed automatically when the JavaScript object is garbage collected.
  let win;
  
  function createWindow() {
      // Create the browser window.
      win = new BrowserWindow({
      width: 800,
  	height: 600,
      'min-width': 600,
      'min-height': 300,
      'accept-first-mouse': true,
      'title-bar-style': 'hidden',
      'webPreferences': {'session': session},
      show: false
      });
  
      // and load the index.html of the app.
      win.loadURL(`file:${__dirname}/app/views/index.html`);
  
      //loading window gracefully
      win.once('ready-to-show', () => {
  	// Open the DevTools.
  	//win.webContents.openDevTools();	
  	win.maximize();
          win.show();
      });
  
      // Emitted when the window is closed.
      win.on('closed', () => {
      // Dereference the window object, usually you would store windows
      // in an array if your app supports multi windows, this is the time
      // when you should delete the corresponding element.
  	win = null;
  	if (process.platform !== 'darwin') {
  	    app.quit();
  	}
      });
  }
  
  var dbSetup = new Promise(
      function (resolve, reject) {
  	// Setup database.
  	var dbUtil = require(`${__dirname}/app/util/DbUtil.js`);
  	dbUtil.setupTargetDb
  	    .then((response) => {
  		console.log(response);
  		return dbUtil.setupRefDb;
  	    })
  	    .then((response) => {
  		console.log(response);
          return dbUtil.setupLookupsDb;
  	    })
          .then((response)=>{
              console.log(response)
              resolve(response)
          })
          .catch((err) => {
  		console.log('Error while DB setup. ' + err);
  		reject(err);
  	    });
      });
  
  function preProcess() {
      dbSetup
  	.then((response) => {
  	    createWindow();
  	})
  	.catch((err) => {
  	    console.log('Error while App intialization.' + err);
  	});
  }
  
  // This method will be called when Electron has finished
  // initialization and is ready to create browser windows.
  // Some APIs can only be used after this event occurs.
  app.on('ready', preProcess);
  
  
  // Quit when all windows are closed.
  app.on('window-all-closed', () => {
      // On OS X it is common for applications and their menu bar
      // to stay active until the user quits explicitly with Cmd + Q
      if (process.platform !== 'darwin') {
      app.quit();
      }
  });
  
  app.on('activate', () => {
      // On OS X it's common to re-create a window in the app when the
      // dock icon is clicked and there are no other windows open.
      if (win === null) {
      createWindow();
      }
  });
  
  
subject: Remove dev tools pane