public Destinations withExpressionType(ExpressionType expressionType) {
        this.expressionType = expressionType.toString();
        return this;
    }
<p>
The type of value in <code>Expression</code>.
</p>

@param expressionType
       The type of value in <code>Expression</code>.
@return Returns a reference to this object so that method calls can be chained together.
@see ExpressionType
aws-java-sdk-iotwireless/src/main/java/com/amazonaws/services/iotwireless/model/Destinations.java