ProfileNode* head() const { return m_head.get(); }
void setHead(PassRefPtr<ProfileNode> head) { m_head = head; }
double totalTime() const { return m_head->totalTime(); }
ProfileNode* head() const { return m_head.get(); }
void setHead(PassRefPtr<ProfileNode> head) { m_head = head; }
double totalTime() const { return m_head->totalTime(); }