Allow the style to do stuff before each row is rendered.
$result: The full array of results from the query.
Overrides RowPluginBase::pre_render
function pre_render($result) {
$cids = array();
$nids = array();
foreach ($result as $row) {
$cids[] = $row->cid;
}
$this->comments = comment_load_multiple($cids);
foreach ($this->comments as &$comment) {
$comment->depth = count(explode('.', $comment->thread)) - 1;
$nids[] = $comment->nid;
}
$this->nodes = node_load_multiple($nids);
}