sed in
          preference to the offset provided on the
          containing completion results.

          This value may be provided independently of
          replacementLength (for example if only one
          differs from the completion result value).
        </p>
      </field>
      <field name="replacementLength" optional="true">
        <ref>int</ref>
        <p>
          The length of the text to be replaced.
          If supplied, this should be used in preference
          to the offset prov