pom.xml

@@ -16,6 +16,7 @@
     <maven.compiler.target>1.8</maven.compiler.target>
     <maven.compiler.source>1.8</maven.compiler.source>
     <commons-lang3.version>3.12.0</commons-lang3.version>
+    <commons-collections4.version>4.4</commons-collections4.version>
   </properties>
 
   <dependencies>
@@ -29,6 +30,11 @@
       <artifactId>commons-lang3</artifactId>
       <version>${commons-lang3.version}</version>
     </dependency>
+    <dependency>
+        <groupId>org.apache.commons</groupId>
+        <artifactId>commons-collections4</artifactId>
+        <version>${commons-collections4.version}</version>
+    </dependency>
     <dependency>
       <groupId>org.junit.jupiter</groupId>
       <artifactId>junit-jupiter-api</artifactId>