gtk-text-iter-forward-to-tag-toggle (iter tag)

iter -- a gtk-text-iter instance
tag -- a gtk-text-tag object, or nil

A boolean whether we found a tag toggle after the iterator.

Moves forward to the next toggle (on or off) of tag, or to the next toggle of any tag if tag is nil.

If no matching tag toggles are found, returns false, otherwise true. Does not return toggles located at the iterator, only toggles after the iterator. Sets the iterator to the location of the toggle, or to the end of the text buffer if no toggle is found.