add - 新增通过当前的 UserTask 获取上级节点对象

workflow-engine-core/src/main/java/cn/axzo/workflow/core/common/utils/BpmnMetaParserHelper.java

@@ -200,4 +200,8 @@ public final class BpmnMetaParserHelper {
         }
         return Optional.ofNullable(elements.get(0));
     }
+
+    public static Optional<UserTask> getPreNode(UserTask userTask) {
+        return Optional.ofNullable(userTask);
+    }
 }