public String getModelSelectionExpression() {
        return this.modelSelectionExpression;
    }
<p>
Represents the model selection expression of a route response. Supported only for WebSocket APIs.
</p>

@return Represents the model selection expression of a route response. Supported only for WebSocket APIs.
aws-java-sdk-apigatewayv2/src/main/java/com/amazonaws/services/apigatewayv2/model/RouteResponse.java