ReferenceError: fn running on worker thread can't resolve Reference

[far11ven]

For My example below:

var Parallel = require('paralleljs');
var _ = require('lodash');

let data = {
"a":{"id":1},
"b":{"id":2},
"c":{"id":3},
"d":{"id":4}
};

for(let i in data){

const p = new Parallel(data[i]);
p.spawn(test)
.then(function (data) {
    console.log("iv",_.capitalize('hello'))
    const documentProcessingData = ["DATA_MODEL_1","DATA_MODEL_2", "DATA_MODEL_3"];

    documentProcessingData.forEach((curr,index)=>{
    const aiProjectProcessing = new Parallel(curr);
    aiProjectProcessing.spawn(dmdPrcosessing) .then(function (data) {
        console.log("Finished", data);
    })
})

});

}

function test(dmd){
console.log("hello",dmd);
console.log("ii", .capitalize('hello')) //can't resolve "" lodash here
return dmd
}

function dmdPrcosessing(val){

console.log("iii", _.capitalize('hello')) //can't resolve "_" lodash here
var start = new Date().getTime();
var end = start;
var waitingTime = (Math.random() * (10000 - 5000) + 5000);
console.log("waitingTime ",waitingTime);

while(end < start + waitingTime){
  end = new Date().getTime();

}
return val;
}

I get the following error:

undefined:3
console.log("ii", _.capitalize('hello'))
^

ReferenceError: _ is not defined
at dmdPrcosessing (eval at (D:\Workspace\Speed Measurement Comparision\node_modules\paralleljs\lib\eval.js:7:5), :3:24)
at process.eval (eval at (D:\Workspace\Speed Measurement Comparision\node_modules\paralleljs\lib\eval.js:7:5), :13:3)
at process.emit (events.js:314:20)
at emit (internal/child_process.js:877:12)
at processTicksAndRejections (internal/process/task_queues.js:85:21)

Is there a better way to do this?