public void setExternalId(String externalId) {
        this.externalId = externalId;
    }
<p>
A value that can be used for cross-account validation.
</p>

@param externalId
       A value that can be used for cross-account validation.
aws-java-sdk-securityhub/src/main/java/com/amazonaws/services/securityhub/model/AwsDmsEndpointDetails.java