code: function loadAdditionalFiles() {
  	try {
  		const appRootPath = require("app-root-path").path;
  		const packageJsonPath = appRootPath + path.sep + "package.json";
  		const packageData = require(packageJsonPath);
  		
  		if (packageData && packageData.hasOwnProperty("PAI")) {
  			if (packageData.PAI && packageData.PAI.hasOwnProperty("includeFiles")) {
  				const additionalFiles = packageData.PAI.includeFiles;
  				
  				PAILogger.info("Additional files to load: " + JSON.stringify(additionalFiles));
  				
  				for (let i = 0; i < additionalFiles.length; i++) {
  					require(appRootPath + "/" + additionalFiles[i]);
  				}
  			}
  		}
  	} catch (e) {
  		PAILogger.error("error while loading includeFiles from package.json");
  		PAILogger.error(e);
  	}
  }
docs: This function load additional files after the bot is loaded.
  Additional files specify in package.json of your project under: PAI.includeFiles = [ "yourFile.js" ]