constructor(element, form, options) {
    form = form || {};
    options = options || {};
    super(element, form, Object.assign(
      options,
      FormBuilder.options,
      ((Formio.options && Formio.options.builder) ? Formio.options.builder : {})
    ));
  }
Creates a new form builder.
@param {HTMLElement} element - The HTML element to place the form builder.
@param {string | object} form - The form to pass to the builder
@param {FormBuilderOptions} options - The options to create this builder.
@returns {FormBuilder} - The form builder instance.