Here's an excellent video tutorial on using gmail, google sheets and the free Yet Another Mail Merge add-in to do a mail merge:

Create a Mail Merge with Gmail and Google Drive / Docs

You write a draft email in gmail, use this format to refer to column names in your google sheet when writing the email: $%contact email address% where 'contact email address' is the column name, then click the 'mail merge' button, choose the gmail draft you want to send, test it on yourself if you wish, then send it to everyone in your spreadsheet. Very straightforward.

How do I do a mail merge with Gmail?
var super_class = function(p) {
    this.p = p + 1;
    this.method = function(a, b) {
        // some code
    };
};

var base_class = function(o) {
    this.o = o;
    super_class.call(this, o);
    this.method = function(a, b) {
        // call super_class .method();
        // some code
    }
}

base_class.prototype = new super_class();

var bc = new base_class(0);
var v1 = bc.o; // 0
var v2 = bc.p; // 1


How can I call the super_class method when the name and properties are supposed to be identical. If I changed the name, I would just call this.method(3, 4); from within another function. I'm creating an extension class to another extension class, so changing the name of the function will not help me.

Also, storing the function in a private variable var pmethod = this.method; is sloppy at best.
