Drupal 8.x

I tried for months to figure this out.  Not being a full time programmer, this was not easy for me. I am sure someone else will have different ideas I just wanted to put this out there so someone might not give up.

The end result is that I can send a CSV file to the site, use Feeds to import the data on a regular schedule if needed, use views to display as desired. 

Hello,

I have a question, if it is possible to set handler settings for entity reference field to get results only if the searched entities have certain value of a field set? Eg they have int field and I would like to fin donly those who have value of 3 in this field.

Thanks.

We've recently moved our site from Drupal 7 to 8 and I am in the process of upgrading a few modules.

I have a question relating to the replacement of fieldsets with details. 

So previously in Drupal 7 I could.

$form['fieldset1']= array(
    '#type' => 'fieldset',
    #collapsible' => FALSE,
    '#collapsed' => FALSE
);

$form['fieldset1']['fieldset2']= array(
    '#type' => 'fieldset',
    #collapsible' => TRUE,
    '#collapsed' => FALSE
);

Is there any any to filter the status messages?

If i have a error message, it should display the errors. I am also having some notice messages which i don't want to display in my page.

notice messages like this one : Notice_Messages

I don't want to show this. I have already changed the option to none in logging and errors under configuration. It's not helping. Is there any other alternative way to do this?

Thanks.

I'm not even sure if I worded that subject with any sense.

Anyway, what I essentially want to do is just parse the <lastmod> content for use in a sitemap index. My org's website is huge and requires an index. simplexml_load_file gives me an error when I try to use it in the preprocessor for my theme and all of the other procedures seem so tedious and memory consuming to just parse the first element of an xml file. 

help.