public String getKey() {
        return this.key;
    }
<p>
The key name that can be used to look up or retrieve the associated value. For example, <code>Department</code>
or <code>Cost Center</code> are common choices.
</p>

@return The key name that can be used to look up or retrieve the associated value. For example,
        <code>Department</code> or <code>Cost Center</code> are common choices.
aws-java-sdk-iam/src/main/java/com/amazonaws/services/identitymanagement/model/Tag.java