Shows how old args keys could sometimes get left over in the code and cause confusion later on as to what was expected during instantiation.

unused_args_var.js

function SearchResultsPageGenerator(args) {
    'use strict';
    var httpRequestHandler = args.httpRequestHandler,
        noLongerNeededObj = args.noLongerNeededObj, // never referenced, always undefined
        sr_chapters_data_handle = args.sr_chapters_data_handle;

    // do stuff ...
}