I am still wondering why the following query doesn't work:
query sortFactsQuery1
$tm: TreeMap()
from accumulate( $f: Fact(),
init( TreeMap map = new TreeMap(); ),
action( map.put(factKey($f), $f); ),
reverse( map.remove(factKey($f)); ),
result( map ) )
$sortedFacts: Collection() from $tm.values()
end
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