LASS="s8"
></TD
></TR
><TR
><TD CLASS="section4"
><IMG SRC="minus.gif" CLASS="coll" ONCLICK="toggle(this,'i:QqisValid')" ALT="show/hide"
> Instances</TD
></TR
><TR
><TD CLASS="body"
><DIV ID="i:QqisValid" STYLE="display:block;"
><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0"
><TR
><TD CLASS="decl"
><A HREF="Qtc-Core-QModelIndex.html#t%3AQqisValid"
>QqisValid</A
> (<A HREF="Qtc-ClassTypes-Core.html#t%3AQModelIndexSc"
>QModelIndexSc</A
> a) ()</TD
></TR
><TR
><TD CLASS="decl"
><A HREF="Qtc-Core-QModel