public CreateFunctionRequest withFunctionVersion(String functionVersion) {
        setFunctionVersion(functionVersion);
        return this;
    }
<p>
The <code>version</code> of the request mapping template. Currently, the supported value is 2018-05-29. Note that
when using VTL and mapping templates, the <code>functionVersion</code> is required.
</p>

@param functionVersion
       The <code>version</code> of the request mapping template. Currently, the supported value is 2018-05-29.
       Note that when using VTL and mapping templates, the <code>functionVersion</code> is required.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-appsync/src/main/java/com/amazonaws/services/appsync/model/CreateFunctionRequest.java