The id of a fork view's first own row (lowest Sequence) when the loaded rows reach it: an inherited row is loaded, or no older rows remain (hasMoreAbove false). Null with no own row loaded.
hasMoreAbove
The id of a fork view's first own row (lowest Sequence) when the loaded rows reach it: an inherited row is loaded, or no older rows remain (
hasMoreAbovefalse). Null with no own row loaded.