Fix for CVE-2021-30180 in apache/dubbo (project apache__dubbo_CVE-2021-30180_2.7.9), commit 041f8bb0a98a912bd363560d5a2339198dcf79a5
Fixed file: dubbo-common/src/test/java/org/apache/dubbo/common/utils/PojoUtilsTest.java
Fixed class: PojoUtilsTest (lines 55-977)
Fixed method: testRealizeCollectionWithNullElement (lines 746-760)
Method signature: void testRealizeCollectionWithNullElement()