Hi, I was recently looking at subclassing `ByteArrayOutputStream` in an application so that I could add a fast VarHandle-based `writeLong(long)` method (writing 8 bytes to the byte array in one go). The internal `ByteArrayOutputStream` buffer is protected, so no issue there, but `ensureCapacity(int)` is private rather than protected, and uses the internal `ArraysSupport` class, so it's not even easy to copy/paste as duplicate code in the subclass. Similar `ensureCapacity` methods in `ArrayList` and `StringBuilder` are public. Would a PR adjusting the visibility of this method from private to protected be accepted?
Take care, Daniel
