#GtkSourceRegionIter is an opaque datatype; ignore all its fields. Initialize the iter with gtksource.region.Region.getStartRegionIter.
Gets the subregion at this iterator.
Moves iter to the next subregion.
#GtkSourceRegionIter is an opaque datatype; ignore all its fields. Initialize the iter with gtksource.region.Region.getStartRegionIter.