public void setConnectionId(String connectionId) {
        this.connectionId = connectionId;
    }
<p>
The ID of the VpcLink used for the integration. Specify this value only if you specify <code>VPC_LINK</code> as
the connection type.
</p>

@param connectionId
       The ID of the VpcLink used for the integration. Specify this value only if you specify
       <code>VPC_LINK</code> as the connection type.
aws-java-sdk-api-gateway/src/main/java/com/amazonaws/services/apigateway/model/PutIntegrationRequest.java