## Get Nested JSON Property
This method returns the value of the nested JSON property if it exists. Otherwise, it returns ```undefined```
```javascript
const MaskData = require('./maskdata');

const innerPropety = Maskdata.getInnerProperty(object, field);

Example: 

const nestedObject = {
  level1: {
    field1: "field1",
    level2: {
      field2: "field2",
      level3: {
        field3: "field3",
        field4: [ { Hello: "world" }, { Hello: "Newworld" }, "Just a String" ]
      }
    }
  },
  value1: "value"
};

const innerPropety = Maskdata.getInnerProperty(nestedObject, 'level1.level2.level3.field4[0].Hello');

```