Inspect Options
These functions are in the module 'util'.
These functions are in the module 'util'. Use require('util') to access them. The util module is primarily designed to support the needs of Node.js's internal APIs. Many of these utilities are useful for your own programs. If you find that these functions are lacking for your purposes, however, you are encouraged to write your own utilities. We are not interested in any future additions to the util module that are unnecessary for Node.js's internal functionality.
https://nodejs.org/api/util.html
Inspect Options
https://nodejs.org/api/util.html#util_util_inspect_object_options