public String getKey() {
        return this.key;
    }
<p>
The key in a key-value pair. The key must be must be no longer than 128 Unicode characters. The key must be
unique for the resource to which it applies.
</p>

@return The key in a key-value pair. The key must be must be no longer than 128 Unicode characters. The key must
        be unique for the resource to which it applies.
aws-java-sdk-cloudtrail/src/main/java/com/amazonaws/services/cloudtrail/model/Tag.java