feat(policy-api): [eclipse-tractusx#803] fix missing import

irs-policy-store/src/main/java/org/eclipse/tractusx/irs/policystore/services/PolicyStoreService.java

@@ -29,6 +29,7 @@
 import java.time.OffsetDateTime;
 import java.util.AbstractMap;
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.Comparator;
 import java.util.LinkedList;
 import java.util.List;
@@ -82,7 +83,6 @@ public class PolicyStoreService implements AcceptedPoliciesProvider {
 
     private static final String DEFAULT = "default";
 
-
     /**
      * Constants for the configured default policy.
      */
@@ -141,20 +141,17 @@ public Policy registerPolicy(final CreatePolicyRequest request) {
 
     /**
      * Find a policy by policy ID.
+     *
      * @param policyId the policy ID
      * @return Returns the policy including a list of associated business partner numbers.
      */
     public Optional<GetPolicyByIdResponse> getPolicyById(final String policyId) {
         final Map<String, List<Policy>> policies = getPolicies(null);
-        return policies.values()
-                       .stream()
-                       .flatMap(Collection::stream)
-                       .filter(p -> p.getPolicyId().equals(policyId))
+        return policies.values().stream().flatMap(Collection::stream).filter(p -> p.getPolicyId().equals(policyId))
                        // In MinIO we store the policy per BPN.
                        // Therefore, we can simply take the first one and collect the keys to get all the
                        // business partner numbers to which the policy is assigned.
-                       .findFirst()
-                       .map(p -> GetPolicyByIdResponse.from(p, policies.keySet().stream().toList()));
+                       .findFirst().map(p -> GetPolicyByIdResponse.from(p, policies.keySet().stream().toList()));
     }
 
     /**