public String getId() {
        return this.id;
    }
<p>
The ID of the asset model property.
</p>
<ul>
<li>
<p>
If you are callling <a
href="https://docs.aws.amazon.com/iot-sitewise/latest/APIReference/API_UpdateAssetModel.html"
>UpdateAssetModel</a> to create a <i>new</i> property: You can specify its ID here, if desired. IoT SiteWise
automatically generates a unique ID for you, so this parameter is never required. However, if you prefer to
supply your own ID instead, you can specify it here in UUID format. If you specify your own ID, it must be
globally unique.
</p>
</li>
<li>
<p>
If you are calling UpdateAssetModel to modify an <i>existing</i> property: This can be either the actual ID in
UUID format, or else <code>externalId:</code> followed by the external ID, if it has one. For more information,
see <a href="https://docs.aws.amazon.com/iot-sitewise/latest/userguide/object-ids.html#external-id-references">
Referencing objects with external IDs</a> in the <i>IoT SiteWise User Guide</i>.
</p>
</li>
</ul>

@return The ID of the asset model property.</p>
        <ul>
        <li>
        <p>
        If you are callling <a
        href="https://docs.aws.amazon.com/iot-sitewise/latest/APIReference/API_UpdateAssetModel.html"
        >UpdateAssetModel</a> to create a <i>new</i> property: You can specify its ID here, if desired. IoT
        SiteWise automatically generates a unique ID for you, so this parameter is never required. However, if
        you prefer to supply your own ID instead, you can specify it here in UUID format. If you specify your own
        ID, it must be globally unique.
        </p>
        </li>
        <li>
        <p>
        If you are calling UpdateAssetModel to modify an <i>existing</i> property: This can be either the actual
        ID in UUID format, or else <code>externalId:</code> followed by the external ID, if it has one. For more
        information, see <a
        href="https://docs.aws.amazon.com/iot-sitewise/latest/userguide/object-ids.html#external-id-references"
        >Referencing objects with external IDs</a> in the <i>IoT SiteWise User Guide</i>.
        </p>
        </li>
aws-java-sdk-iotsitewise/src/main/java/com/amazonaws/services/iotsitewise/model/AssetModelProperty.java