CMB2::add_hidden_field PHP Method

    public function add_hidden_field($field_args, $field_group = null)
    {
        if (isset($field_args['field_args'])) {
            // For back-compatibility.
            $field = new CMB2_Field($field_args);
        } else {
            $field = $this->get_new_field($field_args, $field_group);
        }
        $this->hidden_fields[] = new CMB2_Types($field);
        return $field;
    }