问迁移到Quarkus 2.8.0后有关config属性的警告

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import java.util.Optional;

import io.quarkus.runtime.annotations.ConfigItem;
import io.quarkus.runtime.annotations.ConfigPhase;
import io.quarkus.runtime.annotations.ConfigRoot;

@ConfigRoot(phase = ConfigPhase.RUN_TIME, prefix="", name = "myApp")
public class MyAppConfig {
   
    @ConfigItem(defaultValue = "defaultValue")
    String firstProperty;

    @ConfigItem(defaultValue = "")
    Optional<String> secondProperty;

    @ConfigItem(defaultValue = "defaultValue")
    String thirdProperty;

    // Getters ...

    
}

import static org.junit.jupiter.api.Assertions.assertEquals;

import org.eclipse.microprofile.config.inject.ConfigProperty;
import org.junit.jupiter.api.Test;
import io.quarkus.test.junit.QuarkusTest;

@QuarkusTest
public class MyAppIntegrationTest {

    @ConfigProperty(name="myApp.first-property")
    String firstProperty;

    @ConfigProperty(name="myApp.second-property")
    String secondProperty;

    @ConfigProperty(name="myApp.third-property")
    String thirdProperty;

    @Test
    public void testConfig() {
        assertEquals("firstValue", firstProperty);
        assertEquals("secondValue", secondProperty);
        assertEquals("thirdValue", thirdProperty);
    }

   
}