foreach ( $part->out as $node ) {
if ( is_string( $node ) && is_string( $accum[$lastIndex] ) ) {
$accum[$lastIndex] .= $node;
foreach ( $part->out as $node ) {
if ( is_string( $node ) && is_string( $accum[$lastIndex] ) ) {
$accum[$lastIndex] .= $node;