gtk:flow-box-child-at-pos (flowbox x y)

flowbox -- a gtk:flow-box widget
x -- an integer with the x coordinate of the child widget
y -- an integer with the y coordinate of the child widget

The child widget, which will always be a gtk:flow-box-child widget or nil in case no child widget exists for the given coordinates.

Gets the child widget in the flow box at the given coordinates.