arrayOffset

Returns the offset within this buffer's backing array of the first element of the buffer (optional operation).

If this buffer is backed by an array then buffer position p corresponds to array index p + arrayOffset().

Invoke the .hasArray method before invoking this method in order to ensure that this buffer has an accessible backing array.

The offset within this buffer's array (always 0 for this implementation)

If this buffer is not backed by an accessible array