<orderEntry type="inheritedJdk" />
    <orderEntry type="sourceFolder" forTests="false" />
    <orderEntry type="library" name="Maven: org.springframework.boot:spring-boot-starter-actuator:1.3.1.RELEASE" level="project" />
    <orderEntry type="library" name="Maven: org.springframework.boot:spring-boot-starter:1.3.1.RELEASE" level="project" />
    <orderEntry type="library" name="Maven: org.springframework.boot:spring-boot:1.3.1.RELEASE" level="project" />
    <orderEntry type="library" name="Maven: org.springframework.boot:spring-boot-autoconfigure:1.3.1.RELEASE" level="project" />
    <orderEntry type="library" scope="RUNTIME" name="Maven: org.yaml:snakeyaml:1.16" level="project" />
    <orderEntry type="library" name="Maven: org.springframework.boot:spring-boot-actuator:1.3.1.RELEASE" level="project" />

在idea中，有如上配置文件，在project.iml配置文件中，请问上述配置文件有什么作用？