An object that allows a user to incrementally view a large amount of information.
ATSPI_ROLE_SCROLL_PANE objects are usually accompanied by ATSPI_ROLE_SCROLL_BAR controllers, on which the
ATSPI_RELATION_CONTROLLER_FOR and ATSPI_RELATION_CONTROLLED_BY reciprocal relations are set. See
atspi_get_relation_set.