public function isSelfOrDescendantOf($other) {
   return (
      $this->getLeft() >= $other->getLeft() &&
      $this->getLeft() < $other->getRight() &&
      $this->inSameScope($other)
    );
  }
public function isSelfOrDescendantOf($other) {
   return (
      $this->getLeft() >= $other->getLeft() &&
      $this->getLeft() < $other->getRight() &&
      $this->inSameScope($other)
    );
  }
Returns true if node is self or a descendant.

@param NestedSet
@return boolean