diff --git a/src/main/java/com/example/parser/FlowableExcelMapper.java b/src/main/java/com/example/parser/FlowableExcelMapper.java
index e2a5ee1..14246c1 100644
--- a/src/main/java/com/example/parser/FlowableExcelMapper.java
+++ b/src/main/java/com/example/parser/FlowableExcelMapper.java
@@ -175,4 +175,53 @@ public class FlowableExcelMapper {
         }
         return -1;
     }
+
+    public boolean isSubset(JsonNode asIs, JsonNode toBe) {
+        // If toBe is null, it is always a subset
+        if (toBe == null) {
+            return true;
+        }
+        // If asIs is null, but toBe is not, toBe is not a subset
+        if (asIs == null) {
+            return false;
+        }
+        // If toBo is a value node, compare values
+        if (toBe.isValueNode()) {
+            return asIs.isValueNode() && asIs.asText().equals(toBe.asText());
+        }
+        // If toBe is an array node, check is all elements of toBe exist in asIs
+        if(toBe.isArray()){
+            if (!asIs.isArray() || toBe.size() > asIs.size()) {
+                return false;
+            }
+            for (JsonNode toBeElement : toBe) {
+                boolean found = false;
+                for (JsonNode asIsElement : asIs) {
+                    if (isSubset(asIsElement, toBeElement)) {
+                        found = true;
+                        break;
+                    }
+                }
+                if (!found) {
+                    return false;
+                }
+            }
+            return true;
+        }
+        // If toBe is an object node, check if all fields in toBe exist in asIs
+        if (toBe.isObject()){
+           if  (!asIs.isObject()){
+               return false;
+           }
+           for (Iterator<String> iterator = toBe.fieldNames(); iterator.hasNext(); ) {
+               String fieldName = iterator.next();
+               if (!asIs.has(fieldName) || !isSubset(asIs.get(fieldName), toBe.get(fieldName))){
+                   return false;
+               }
+           }
+           return true;
+        }
+        // If none of the above matches, return false
+        return false;
+    }
 }
diff --git a/src/test/java/com/example/parser/FlowableExcelMapperTest.java b/src/test/java/com/example/parser/FlowableExcelMapperTest.java
index 035c9a1..415cc8d 100644
--- a/src/test/java/com/example/parser/FlowableExcelMapperTest.java
+++ b/src/test/java/com/example/parser/FlowableExcelMapperTest.java
@@ -1,6 +1,7 @@
 package com.example.parser;
 
 import com.fasterxml.jackson.databind.JsonNode;
+import org.assertj.core.api.Assertions;
 import org.junit.jupiter.api.TestInstance;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
@@ -40,7 +41,10 @@ class FlowableExcelMapperTest {
     }
     @ParameterizedTest
     @MethodSource("excelMapperTestData")
-    public void excelMapperTest(JsonNode sheet) {
-        logger.info("node2={}{}", System.lineSeparator(), sheet.toPrettyString());
+    public void excelMapperTest(JsonNode row) {
+        JsonNode asIs = row.get("root");
+        JsonNode toBe = row.get("test");
+        logger.info("{}asIs= {}{}toBe= {}{}", System.lineSeparator(), asIs.toPrettyString(), System.lineSeparator(), toBe.toPrettyString(), System.lineSeparator());
+        Assertions.assertThat(flowableExcelMapper.isSubset(asIs, toBe)).isTrue();
     }
 }
diff --git a/src/test/resources/flowableExcelMapperTestData.xlsx b/src/test/resources/flowableExcelMapperTestData.xlsx
index cdb53f0..0cd1519 100644
Binary files a/src/test/resources/flowableExcelMapperTestData.xlsx and b/src/test/resources/flowableExcelMapperTestData.xlsx differ