public CreateRuleRequest withExpression(String expression) {
        setExpression(expression);
        return this;
    }
<p>
The rule expression.
</p>

@param expression
       The rule expression.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-frauddetector/src/main/java/com/amazonaws/services/frauddetector/model/CreateRuleRequest.java