Extending the functionality of existing Gatsby Plugins

[MrBasset]

Hi,

I'm looking to extend the functionality of a Gatsby Plugin, specifically gatsby-transformer-cloudinary. The change I want to make is very specific to a job so very unlikely to be incorporated into the plug-in itself, so I want to just extend the plug-in. I'd like to avoid forking the repo to avoid merging headaches; though if that's the best option, so be it.

I had found this article suggesting a way to extend/replace functionality in node modules. For example:

// include the module that you like extend
var fs = require('fs');

// add a new function, printMessage(), to the module
fs.printMessage = function(str) {
    console.log("Message from newly added function to the module");
    console.log(str);
}

// re-export the module for changes to take effect
module.exports = fs 

// you may use the newly added function
fs.printMessage("Success");

Could the same technique be used for a gatsby plug-in, and would it be enough to "extend" the module in an index.js of a different plug-in if I had the Cloudinary plugin as a dependency?

If it helps, I'd be looking to amend this method of the plug-in, calling out to some additional functionality just ahead of the call to createImageNode.

Thanks,