static _getFromGlobalList(domElement) { //FIXME test this
        if (this._doesGlobalListExists()) {
            return window[this.autoNumericGlobalListName].get(domElement);
        }

        return null;
    }
Return the value associated to the key `domElement` passed as a parameter.
The value is the AutoNumeric object that manages the DOM element `domElement`.

@param {HTMLElement|HTMLInputElement} domElement
@returns {null|AutoNumeric}
@private