PRInt32 numChildren; GetChildCount(&numChildren);
NS_IMETHODIMP nsAccessible::GetFirstChild(nsIAccessible * *aFirstChild) {    if (gIsCacheDisabled) {    InvalidateChildren();  }  PRInt32 numChildren;  GetChildCount(&numChildren);  // Make sure we cache all of the children  NS_IF_ADDREF(*aFirstChild = mFirstChild);  return NS_OK;  }