For example:

model/l2-types/target/generated-sources/sal/org/opendaylight/yang/gen/v1/urn/opendaylight/l2/types/rev130827/VlanId.java

public class VlanId
implements Serializable {

private static final List<Range<BigInteger>> _range;

public VlanId(java.lang.Integer _value) {
if (_value != null) {
BigInteger _constraint = BigInteger.valueOf(_value);
boolean isValidRange = false;
for (Range<BigInteger> r : range()) {
if (r.contains(_constraint))

{ isValidRange = true; }

}

This is clearly inefficient: we know what the allowed range/type is, so any ranges have to fit into that too – which should allow us to skip instantiation on _constraint and more importantly, use more efficient range checks.

This is a post-Helium item, because the type of _range is leaked via:

public static List<Range<BigInteger>> range()

{ return _range; }

so this constitutes a change in the binding specification.