getChildAtIndex
Gets the nth child in the @box.
Return
the child widget, which will always be a GtkFlowBoxChild or null in case no child widget with the given index exists.
Parameters
idx
the position of the child
Gets the nth child in the @box.
the child widget, which will always be a GtkFlowBoxChild or null in case no child widget with the given index exists.
the position of the child