Hey @devang-ey 
The warning message is telling you what’s happening.
Using “_” is deprecated. Use “require(‘lodash’)” instead.
This would have been seen just before V11, as the sandbox was updated towards the end of V10.
There a several internal sandbox modules that are being deprecated and this is one of them. We actually have 2 different versions of Lodash running, an older one that is immediately available using the _. naming convention and one where you use require(‘lodash’) to call the newer version.
For example:
const lodash = require('lodash');
console.log(lodash.random(10, 12));
The _ option will still be supported for the next 2 major versions but it will eventually stop working in the sandbox.