src/main/java/org/apache/commons/lang3/Functions.java [491:531]:
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        } catch (final Throwable t) {
            throw rethrow(t);
        }
    }

    /**
     * <p>
     * Rethrows a {@link Throwable} as an unchecked exception. If the argument is already unchecked, namely a
     * {@code RuntimeException} or {@code Error} then the argument will be rethrown without modification. If the
     * exception is {@code IOException} then it will be wrapped into a {@code UncheckedIOException}. In every other
     * cases the exception will be wrapped into a {@code
     * UndeclaredThrowableException}
     * </p>
     *
     * <p>
     * Note that there is a declared return type for this method, even though it never returns. The reason for that is
     * to support the usual pattern:
     * </p>
     *
     * <pre>
     * throw rethrow(myUncheckedException);</pre>
     *
     * <p>
     * instead of just calling the method. This pattern may help the Java compiler to recognize that at that point an
     * exception will be thrown and the code flow analysis will not demand otherwise mandatory commands that could
     * follow the method call, like a {@code return} statement from a value returning method.
     * </p>
     *
     * @param throwable The throwable to rethrow ossibly wrapped into an unchecked exception
     * @return Never returns anything, this method never terminates normally.
     */
    public static RuntimeException rethrow(final Throwable throwable) {
        Objects.requireNonNull(throwable, "throwable");
        if (throwable instanceof RuntimeException) {
            throw (RuntimeException) throwable;
        } else if (throwable instanceof Error) {
            throw (Error) throwable;
        } else if (throwable instanceof IOException) {
            throw new UncheckedIOException((IOException) throwable);
        } else {
            throw new UndeclaredThrowableException(throwable);
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src/main/java/org/apache/commons/lang3/function/Failable.java [362:403]:
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        } catch (final Throwable t) {
            throw rethrow(t);
        }
    }

    /**
     * <p>
     * Rethrows a {@link Throwable} as an unchecked exception. If the argument is already unchecked, namely a
     * {@code RuntimeException} or {@code Error} then the argument will be rethrown without modification. If the
     * exception is {@code IOException} then it will be wrapped into a {@code UncheckedIOException}. In every other
     * cases the exception will be wrapped into a {@code
     * UndeclaredThrowableException}
     * </p>
     *
     * <p>
     * Note that there is a declared return type for this method, even though it never returns. The reason for that is
     * to support the usual pattern:
     * </p>
     *
     * <pre>
     * throw rethrow(myUncheckedException);
     * </pre>
     *
     * <p>
     * instead of just calling the method. This pattern may help the Java compiler to recognize that at that point an
     * exception will be thrown and the code flow analysis will not demand otherwise mandatory commands that could
     * follow the method call, like a {@code return} statement from a value returning method.
     * </p>
     *
     * @param throwable The throwable to rethrow ossibly wrapped into an unchecked exception
     * @return Never returns anything, this method never terminates normally.
     */
    public static RuntimeException rethrow(final Throwable throwable) {
        Objects.requireNonNull(throwable, "throwable");
        if (throwable instanceof RuntimeException) {
            throw (RuntimeException) throwable;
        } else if (throwable instanceof Error) {
            throw (Error) throwable;
        } else if (throwable instanceof IOException) {
            throw new UncheckedIOException((IOException) throwable);
        } else {
            throw new UndeclaredThrowableException(throwable);
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