gs:
          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 == end

    @support_annotation_or_set
    def iswithin(self, start: int, end: int) -&gt; bool:
        &#34;&#34;&#34;
        Checks if this span is within the given span, annotation or
        annotation set, i.e. both the start and end offsets of this annotation
        are after t