oextensive with the given span, annotation or
        annotation set, i.e. has exactly the same start and end offsets.

        Note: this can be called with an Annotation or AnnotationSet instead of `start` and `end`
          (see gatenlp._utils.support_annotation_or_set)

        Args:
          start: start offset of the span
          end: end offset of the span

        Returns:
          `True` if coextensive, `False` otherwise

        &#34;&#34;&#34;
        return self.start == start and self.end 