servo-php / fluidxml

                return $this->addChild($child, ...$optionals);

        }

        public function prependSibling($sibling, ...$optionals)

        {

                if ($this->document->dom->documentElement === null) {

                        // If the document doesn't have at least one root node,

                        // the sibling creation fails. In this case we replace

                        // the sibling creation with the creation of a generic node.

                        return $this->addChild($sibling, ...$optionals);

                }

                $context     = $this->context();

                $new_context = $context->prependSibling($sibling, ...$optionals);

                return $this->chooseContext($context, $new_context);

        }

        // Alias of ->prependSibling().

        public function prepend($sibling, ...$optionals)

                return $this->prependSibling($sibling, ...$optionals);

        }

        public function appendSibling($sibling, ...$optionals)

        {

                if ($this->document->dom->documentElement === null) {

                        // If the document doesn't have at least one root node,

                        // the sibling creation fails. In this case we replace

                        // the sibling creation with the creation of a generic node.

                        return $this->addChild($sibling, ...$optionals);

                }

                $context     = $this->context();

                $new_context = $context->appendSibling($sibling, ...$optionals);

                return $this->chooseContext($context, $new_context);

        }

        // Alias of ->appendSibling().

        public function append($sibling, ...$optionals)