gtk:cell-area-context-preferred-height-for-width (context width)

context -- a gtk:cell-area-context object
width -- an integer for a proposed width for allocation
minimum-height -- an integer for the minimum height, or nil
natural-height -- an integer for the natural height, or nil

Gets the accumulative preferred height for width for all rows which have been requested for the same said width with this context. After the gtk:cell-area-context-reset function is called and/or before ever requesting the size of a gtk:cell-area widget, the returned values are -1.