public void setApiMappingSelectionExpression(String apiMappingSelectionExpression) {
        this.apiMappingSelectionExpression = apiMappingSelectionExpression;
    }
<p>
The API mapping selection expression.
</p>

@param apiMappingSelectionExpression
       The API mapping selection expression.
aws-java-sdk-apigatewayv2/src/main/java/com/amazonaws/services/apigatewayv2/model/CreateDomainNameResult.java