public static void assertNotNull( Object o ) {
        assertNotNull( o, "Expected a value to not be null, but it apparently was null" );
    }
A collection of methods to assert certain conditions.
If an asserted condition is false a {@link JGivenInternalDefectException} is thrown.
jgiven-core/src/main/java/com/tngtech/jgiven/impl/util/AssertionUtil.java