"dependencies": {
    "@appium/base-plugin": "^1.6.4"
  },  
  "appium": {
    "pluginName": "<plugin name>",
    "mainClass": "<class name>"
  },
  

export default class AppiumPlugin extends BasePlugin {

 async createSession(next, driver, jwpDesCaps, jwpReqCaps, caps) {
   log.info('Building my new appium plugin');
   .....
   await next();
   }
}

static newMethodMap = {
    '/session/:sessionId/fake_data': {
      GET: {command: 'getFakeSessionData'}
    },
};


async getFakeSessionData (next, driver) {
    await B.delay(1);
    return driver.fakeSessionData || null;
}

driver.getFakeData()

appium plugin install --source=local <path to plugin>

appium plugin install --source=npm appium-wait-plugin

appium --plugins=element-wait