static/ext/src/ux/AceEditor.js
function(nameOrNumber) {
        var name = (typeof nameOrNumber === 'string') ?
            nameOrNumber :
            Object.keys(this._assignments)[nameOrNumber];
        return this._assignments[name];
    }
function(nameOrNumber) {
        var name = (typeof nameOrNumber === 'string') ?
            nameOrNumber :
            Object.keys(this._assignments)[nameOrNumber];
        return this._assignments[name];
    }
Assignments have an order, so we need to store them in an array.
But we also need named access ...