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Currently the constraint type needs to be specified twice when using {{GenericConstraintDef}}:
{code}
new GenericConstraintDef<MyConstraint>( MyConstraint.class )
.param( "myParam", 2 );
{code}
This could be avoided e.g. by providing a static factory method which leverages type inference:
{code}
GenericConstraintDef.getInstance( MyConstraint.class )
.param( "myParam", 2 );
{code}
Or we provide a parameterless constructor used by anonymous subclasses and retrieve the value of the type parameter internally:
{code}
new GenericConstraintDef< LuggageCountMatchesPassengerCount MyConstraint >(){}
.param( "myParam", 2 );
{code}
The latter would break compatability though if we want to enforce subclassing by making {{GenericConstraintDef}} an anonymous class.
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