gtk:text-tag-accumulative-margin (object)

object -- a gtk:text-tag object
setting -- a boolean whether the margins accumulate

Accessor of the accumulative-margin slot of the gtk:text-tag class. Whether the margins accumulate or override each other. When set to true the margins of this tag are added to the margins of any other non-accumulative margins present. When set to false the margins override one another, the default.