Get the number of fields on an index : <p>For optimization purposes, I am trying to cut down my total field count. However before I am going to do that I want to get an idea of how many fields I actually have. There doesn't seem to be any Information in the <code>_stats</code> endpoint and I can't quite figure out how the migration tool does its field count calculation.</p>

<p>Is there some way, either with an endpoint or by other means, to get the total field count of a specified index?</p>
