$Obj->parent()

Returns a content object referencing the object's parent.

In the case of a content object, this will return the content referenced by parentId.

In the case of a comment object, this will return the content referenced by contentId.

// access parent content
if ($content->parent()) {
  echo "This is a child of: " . $content->parent()->write('headline');
}

// reference a comment's parent
$alert = $content->author()->get('nick') . ' left a comment on ' . $comment->parent()->get('headline');

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