BindingMap b = BindingFactory.create() ;
JsonValue v = iter.next() ;
if ( ! v.isObject() )
throw new ResultSetException("Entry in 'bindings' array must be an object {}") ;
JsonObject x = v.getAsObject() ;
Set<String> varNames = x.keys() ;
for ( String vn : varNames )
{
if ( ! vars.contains(vn) )
; // Warning
JsonValue vt = x.get(vn) ;