src/Baum/Node.php
public function isDescendantOf($other) {
    return (
      $this->getLeft() > $other->getLeft()  &&
      $this->getLeft() < $other->getRight() &&
      $this->inSameScope($other)
    );
  }
public function isDescendantOf($other) {
    return (
      $this->getLeft() > $other->getLeft()  &&
      $this->getLeft() < $other->getRight() &&
      $this->inSameScope($other)
    );
  }
Returns true if node is a descendant.

@param NestedSet
@return boolean