gtk:flow-box-max-children-per-line (object)

object -- a gtk:flow-box widget
n-children -- an unsigned integer for the maximum number of children per line

The accessor for the max-children-per-line slot gets or sets the maximum number of children per line to request and allocate space for in the orientation of the flow box. Setting the maximum number of children per line limits the overall natural size request to be no more than n-children children long in the given orientation.