apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/entity/model/NamespaceGrayDelReleaseModel.java/NamespaceGrayDelReleaseModel/setGrayDelKeys
class NamespaceGrayDelReleaseModel:    public void setGrayDelKeys(Set<String> grayDelKeys) {
        this.grayDelKeys = grayDelKeys;
    }