public final fun bar(x: R|kotlin/Any?|): R|kotlin/Boolean|
    [R|Contract description]
     <
        Returns(WILDCARD) -> x is kotlin/Int
    >


public final fun foo(x: R|kotlin/Any?|): R|kotlin/Boolean|
    [R|Contract description]
     <
        Returns(WILDCARD) -> x is kotlin/String
    >