D13819.id33369.diff
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	diff --git a/src/parser/aast/api/AASTNode.php b/src/parser/aast/api/AASTNode.php
	--- a/src/parser/aast/api/AASTNode.php
	+++ b/src/parser/aast/api/AASTNode.php
	@@ -180,6 +180,18 @@
	return $tokens;
	}

	+ final public function isDescendant(AASTNode $node) {
	+ while ($node) {
	+ if ($this === $node) {
	+ return true;
	+ }
	+
	+ $node = $node->getParentNode();
	+ }
	+
	+ return false;
	+ }
	+
	public function selectDescendantsOfType($type_name) {
	return $this->selectDescendantsOfTypes(array($type_name));
	}