Within a plugin I need to add and populate (data is available inside my plugin) a column to **com_menus&view=menus** view in administration.

[![enter image description here][1]][1]

my_plugin.php

    ...
    public function onAfterInitialise()
    {
        $input = JFactory::getApplication()->input;
        if (JFactory::getApplication()->isAdmin()
            && $input->getCmd('option') == 'com_menus'
            && $input->getCmd('view') == 'menus')
        {
            JRequest::setVar('view', 'menusextra');
            JLoader::register('MenusViewMenusextra', __DIR__ . '/views/menus/view.html.php');
        }
    }
    ...

view.html.php

    ...
    JLoader::register('MenusViewMenus', JPATH_ADMINISTRATOR . '/components/com_menus/views/menus/view.html.php');
    JLoader::register('MenusModelMenus', JPATH_ADMINISTRATOR . '/components/com_menus/models/menus.php');
    
    class MenusViewMenusextra extends MenusViewMenus
    {
        public function display($tpl = null)
        {
            $this->items         = $this->get('Items');
            $this->pagination    = $this->get('Pagination');
            $this->state         = $this->get('State');
            $this->filterForm    = $this->get('FilterForm');
            $this->activeFilters = $this->get('ActiveFilters');
            $this->canDo         = JHelperContent::getActions('com_menus');
            $this->db            = JFactory::getDbo();
    
            $this->addTemplatePath(__DIR__ . '/tmpl/');
            parent::display($tpl);
        }
    }
    
    class MenusModelMenusextra extends MenusModelMenus {}
    ...

Now, I am getting the error **"JForm::getInstance could not load file"**. Think this is due because it is not being able to load the *filter_menusextra.xml*, the original (core) *filter_menus.xml* that is located *\administrator\components\com_menus\models\forms*. Is it because it uses the JLayout search tools and need to load the xml file?

Made the following test: renamed *filter_menus.xml* to *filter_menusextra.xml* in *\administrator\components\com_menus\models\forms* and it worked. But as I am overriding it I should be able to make it inside my plugin, not the core one?! What am I doing wrong?

Could someone help me please on this?
Thank you.

  [1]: https://i.sstatic.net/a0WDz.png