Helper function to create accordion paragraph.
array $items: Accordion items.
\Drupal\Core\Entity\EntityInterface Paragraphs accordion entity.
function _paragraphs_collection_demo_create_accordion_paragraph(array $items) {
// Accordion paragraph.
$accordion_paragraph = Paragraph::create([
'type' => 'accordion',
'paragraphs_accordion_paragraphs' => $items,
]);
$accordion_paragraph
->save();
return $accordion_paragraph;
}