public final fun returnsAndCalls(b: R|kotlin/Boolean|, block: R|() -> kotlin/Unit|): R|kotlin/Unit|
    [R|Contract description]
     <
        Returns(FALSE) -> !b
        CallsInPlace(block, UNKNOWN)
        Returns(TRUE) -> b
    >


public final fun returnsAndFinished(b: R|kotlin/Boolean|): R|kotlin/Unit|
    [R|Contract description]
     <
        Returns(TRUE) -> b
        Returns(WILDCARD) -> b != null
        Returns(FALSE) -> !b
    >


public final fun severalCalls(x: R|() -> kotlin/Unit|, y: R|() -> kotlin/Unit|): R|kotlin/Unit|
    [R|Contract description]
     <
        CallsInPlace(x, AT_MOST_ONCE)
        CallsInPlace(y, AT_LEAST_ONCE)
    >


public final fun threeReturnsValue(b: R|kotlin/Boolean|): R|kotlin/Unit|
    [R|Contract description]
     <
        Returns(NOT_NULL) -> b != null
        Returns(TRUE) -> b
        Returns(FALSE) -> !b
    >


public final fun twoReturnsValue(b: R|kotlin/Boolean|): R|kotlin/Unit|
    [R|Contract description]
     <
        Returns(TRUE) -> b
        Returns(FALSE) -> !b
    >