gtk:cell-area-context-push-preferred-width (context minimum-width natural-width)

context -- a gtk:cell-area-context object
minimum-width -- an integer with the proposed new minimum width for context
natural-width -- an integer with the proposed new natural width for context

Causes the minimum and/or natural width to grow if the new proposed sizes exceed the current minimum and natural width.

This is used by gtk:cell-area-context implementations during the request process over a series of gtk:tree-model rows to progressively push the requested width over a series of the gtk:cell-area-preferred-width function requests.