public Integer getCountNull() {
        return this.countNull;
    }
<p>
The number of null values in the field. If the response value is -1, refer to <code>CountNullLong</code>.
</p>

@return The number of null values in the field. If the response value is -1, refer to <code>CountNullLong</code>.
aws-java-sdk-forecast/src/main/java/com/amazonaws/services/forecast/model/Statistics.java