public void setKey(String key) {
        this.key = key;
    }
<p>
For <code>SCTE35_ENHANCED</code> output, defines a key. MediaTailor takes this key, and its associated value, and
generates the key/value pair within the <code>EXT-X-ASSET</code>tag. If you specify a key, you must also specify
a corresponding value.
</p>

@param key
       For <code>SCTE35_ENHANCED</code> output, defines a key. MediaTailor takes this key, and its associated
       value, and generates the key/value pair within the <code>EXT-X-ASSET</code>tag. If you specify a key, you
       must also specify a corresponding value.
aws-java-sdk-mediatailor/src/main/java/com/amazonaws/services/mediatailor/model/KeyValuePair.java