corner
Installs the child in the corner slot, the square where two of the pane's edges meet.
The key travels to setCorner as written, and which physical corner a leading or trailing key names is the pane's answer, resolved against its component orientation as the call reaches it. The region a child fills here is therefore the key it spelled: two children spelling one key are refused, and two spelling one corner two ways are left to the pane, which shows the later of them, as setCorner does for any caller.
Return
this chain with the corner region declared on it.
Parameters
corner
the ScrollPaneCorner JScrollPane corner key naming the slot