public UpdateCachePolicyRequest withIfMatch(String ifMatch) {
        setIfMatch(ifMatch);
        return this;
    }
<p>
The version of the cache policy that you are updating. The version is returned in the cache policy's
<code>ETag</code> field in the response to <code>GetCachePolicyConfig</code>.
</p>

@param ifMatch
       The version of the cache policy that you are updating. The version is returned in the cache policy's
       <code>ETag</code> field in the response to <code>GetCachePolicyConfig</code>.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-cloudfront/src/main/java/com/amazonaws/services/cloudfront/model/UpdateCachePolicyRequest.java