public String getKey() {
        return this.key;
    }
<p>
The required name of the tag. The string value can be from 1 to 128 Unicode characters in length.
</p>

@return The required name of the tag. The string value can be from 1 to 128 Unicode characters in length.
aws-java-sdk-iotthingsgraph/src/main/java/com/amazonaws/services/iotthingsgraph/model/Tag.java