public String getKey() {
        return this.key;
    }
<p>
The key (name) of a tag.
</p>
<p>
Valid values: A-Z, a-z, 0-9, space, ".:/=+\-@"
</p>
<p>
Constraints: Each key can be 1-128 characters long.
</p>

@return The key (name) of a tag.</p>
        <p>
        Valid values: A-Z, a-z, 0-9, space, ".:/=+\-@"
        </p>
        <p>
        Constraints: Each key can be 1-128 characters long.
aws-java-sdk-route53/src/main/java/com/amazonaws/services/route53domains/model/Tag.java