public DescribeCacheParametersRequest withSource(String source) {
        setSource(source);
        return this;
    }
<p>
The parameter types to return.
</p>
<p>
Valid values: <code>user</code> | <code>system</code> | <code>engine-default</code>
</p>

@param source
       The parameter types to return.</p>
       <p>
       Valid values: <code>user</code> | <code>system</code> | <code>engine-default</code>
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-elasticache/src/main/java/com/amazonaws/services/elasticache/model/DescribeCacheParametersRequest.java