<div dir="auto">There are a number of intermediate lists that are certainly non-empty, but their types don't reflect that. I wonder if using a non-empty list type unpacked into the list of lists might be helpful.</div><div class="gmail_extra"><br><div class="gmail_quote">On Mar 28, 2017 3:39 PM, "Gregory Popovitch" <<a href="mailto:greg7mdp@gmail.com">greg7mdp@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><u></u>



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<div dir="ltr" align="left"><span class="m_-3213585517565692730159493719-28032017"><font color="#000080" face="Calibri">OK, here is the current proposed change - tests look 
good:</font></span></div>
<div dir="ltr" align="left"><span class="m_-3213585517565692730159493719-28032017"><font color="#000080" face="Calibri"></font></span> </div>
<div dir="ltr" align="left"><span class="m_-3213585517565692730159493719-28032017"><img src="cid:159493719@28032017-03A3"></span></div>
<div dir="ltr" align="left"><span class="m_-3213585517565692730159493719-28032017"><font color="#000080" face="Calibri"></font></span> </div>
<div dir="ltr" align="left"><span class="m_-3213585517565692730159493719-28032017"><font color="#000080" face="Calibri">Any comments/opposition from the community?</font></span></div>
<div dir="ltr" align="left"><span class="m_-3213585517565692730159493719-28032017"><font color="#000080" face="Calibri"></font></span> </div>
<div dir="ltr" align="left"><span class="m_-3213585517565692730159493719-28032017"><font color="#000080" face="Calibri">Thanks,</font></span></div>
<div dir="ltr" align="left"><span class="m_-3213585517565692730159493719-28032017"><font color="#000080" face="Calibri"></font></span> </div>
<div dir="ltr" align="left"><span class="m_-3213585517565692730159493719-28032017"><font color="#000080" face="Calibri">greg</font></span></div>
<div class="gmail_extra"><font color="#000080" face="Calibri"></font> </div></div>
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<br></blockquote></div></div>