Returns a slice of this buffer's sub-region. Modifying the content of
the returned buffer or this buffer affects each other's content while
they maintain separate indexes and marks.
This method does not modify {@code readerIndex} or {@code writerIndex} of
this buffer.
<p>
Also be aware that this method will NOT call {@link #retain()} and so the
reference count will NOT be increased.
Returns a slice of this buffer's sub-region. Modifying the content of the returned buffer or this buffer affects each other's content while they maintain separate indexes and marks. This method does not modify {@code readerIndex} or {@code writerIndex} of this buffer. <p> Also be aware that this method will NOT call {@link #retain()} and so the reference count will NOT be increased.