nsString& operator=( const nsPromiseReadable<PRUnichar>& aReadable )        { Assign(aReadable); return *this; }
nsAutoString& operator=( const nsPromiseReadable<PRUnichar>& aReadable )        { Assign(aReadable); return *this; }
  nsString& operator=( const nsPromiseReadable<PRUnichar>& aReadable )        { Assign(aReadable); return *this; }