8569 private struct OnlyResult(T, size_t arity)  in OnlyResult()  function
8664 private struct OnlyResult(T, size_t arity : 1)  struct
8666     @property T front()  in front()
8671     @property T back()  in back()
8676     @property bool empty() const { return _empty; }  in empty()
8677     @property size_t length() const { return !_empty; }  in length()
8678     @property auto save() { return this; }  in save()
8679     void popFront()  in popFront()
8703     OnlyResult opSlice()  in opSlice()  argument
8708     OnlyResult opSlice(size_t from, size_t to)  in opSlice()  argument
8728 private struct OnlyResult(T, size_t arity : 0)  argument