Add comment for _defaults and _name variables

[cm0s]

It could be useful to get a small comment above this code :

 this._defaults = defaults;
 this._name = pluginName;

Is it to ensure we access a protected defaults and plugin name variables which are not modifiable from outside the plugin (after the plugin initialization)?

[Man7398]

The _ prefix is a common convention for naming private variables in JavaScript. This helps to distinguish them from public variables, which are typically named without the _ prefix.

The following is a possible comment that could be added above the code:

// Store the default options and plugin name in private variables
// so that they cannot be modified from outside the plugin.
this._defaults = defaults;
this._name = pluginName;