class foo {}
class bar extends foo {}
class baz extends bar {}
 
// Method
 
class MethodTest {
    
    bar overrideTest(bar a, bar b) { return new bar() } // success of clause 3
    
    bar overrideTest(baz a, bar b) { // 4/5 failure of clauses 3 and 4 (parameter type not supertype of bar)
        return new bar()
    }
 
}
 
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