The function
docking-layout-pane-visible-p
returns a boolean indicating whether
pane
is currently visible in the Docking Group of
docking-layout
.
pane
may be docked in any member of the Docking Group, or undocked.
(setf docking-layout-pane-visible-p) may be used to change the visiblity of pane in docking-layout only when pane is dockable in the Docking Group of docking-layout .