tFeatures helper for copying
the features from another annotation in the results</dd>
<dt><strong><code>span</code></strong></dt>
<dd>the span of the annotation, this can be a GetSpan helper for copying the span from another
annotation in the results</dd>
<dt><strong><code>resultidx</code></strong></dt>
<dd>the index of the result to use if more than one result is in the Success. If None,
the AddAnn action is performed for all results</dd>
<dt><strong><code>matchidx</code></strong></dt>
<dd>the index of the