insertRange
Copies text, tags, and paintables between @start and @end and inserts the copy at @iter.
The order of @start and @end doesn’t matter.
Used instead of simply getting/inserting text because it preserves images and tags. If @start and @end are in a different buffer from
Parameters
iter
a position in @buffer
start
a position in a GtkTextBuffer
end
another position in the same buffer as @start