public function removeLastSibling($first_node_id)
{
if (!$this->hasIdentifier($first_node_id)) {
throw new e\NodeException(S_SPAN . "The node {$first_node_id} does not exist." . E_SPAN);
}
$first_node = $this->node_map[$first_node_id];
$field_id = StructuredDataNode::getFieldIdentifier($first_node_id);
// non-ambiguous path, no multiple ancestor
if (strpos($first_node_id, $field_id) !== false) {
return $this->removeLastNodeFromField($field_id);
}
// with multiple ancestor
$parent_id = $first_node->getParentId();
$parent_node = $this->node_map[$parent_id];
if (self::DEBUG) {
u\DebugUtility::out("Parent ID: " . $parent_id);
}
$shared_id = StructuredDataNode::removeLastIndex($first_node_id);
if (self::DEBUG) {
u\DebugUtility::out("Shared ID: " . $shared_id);
}
$shared_id = StructuredDataNode::removeLastIndex($first_node_id);
$parent_node->removeLastChildNode($shared_id);
$this->identifiers = array_keys($this->node_map);
return $this;
}
