public Condition withExpressionString(String expressionString) {
        setExpressionString(expressionString);
        return this;
    }
<p>
The expression string that is evaluated.
</p>

@param expressionString
       The expression string that is evaluated.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-lexmodelsv2/src/main/java/com/amazonaws/services/lexmodelsv2/model/Condition.java