private void addFirstPropertySource(final CompositePropertySource composite,
			NacosPropertySource nacosPropertySource, boolean ignoreEmpty) {
		if (null == nacosPropertySource || null == composite) {
			return;
		}
		if (ignoreEmpty && nacosPropertySource.getSource().isEmpty()) {
			return;
		}
		composite.addFirstPropertySource(nacosPropertySource);
	}
Add the nacos configuration to the first place and maybe ignore the empty
configuration.
spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/client/NacosPropertySourceLocator.java