How to migrate multi-value link field in Drupal 8

example.php

<?php

class Example extends SourcePluginBase {

  public function prepareRow(Row $row) {
    parent::prepareRow($row);
    
    // I do some data manipulation to end up with an array that looks like this,
    // which I want to import into multi-value link field.
    $links = [
      [
        'title' => 'Link 1',
        'uri' => 'URI 1',
      ],
      [
        'title' => 'Link 2',
        'uri' => 'URI 2',
      ],
      [
        'title' => 'Link 3',
        'uri' => 'URI 3',
      ],
    ];

    $row->setSourceProperty('links', $links);
  }
}

migrate_plus.migration.example.yml

id: example
label: 'Example'
source:
  plugin: example
  keys:
    - iid
process:
  type:
    plugin: default_value
    default_value: example
  title: title
  
  # This is a multi-value drupal core link field.
  # I want to migrate title and uri for each link.
  # See example.php source plugin in this gist.
  # This does not work.
  field_links: links
  
  # This also does not work.
  'field_links/title': 'links/title'
  'field_links/uri': 'links/uri'
  
  # This worked!
  field_links:
    plugin: iterator
    source: links
    process:
      title: title
      uri: uri

destination:
  plugin: 'entity:node'

For those who need to import from a CSV file, here's an example of how it worked for me:

I created a preprocess so that the links were in this format:

CSV file:

ExampleId,Links
17327,"Link Text 1,www.google.com|Link Text 2,www.google.com|Link Text 3,www.google.com|Link Text 4,www.google.com"

And in migrate I did it this way:

  link_items:
    - plugin: skip_on_empty
      source: Links
      method: process
    - plugin: explode
      delimiter: '|'
  field_buttons:
    - plugin: explode
      source: '@link_items'
      delimiter: ','
    - plugin: sub_process
      process:
        title: '0'
        uri: '1'