Update datamodel/openapi/openapi-core/src/main/java/com/sap/cloud/sdk/services/openapi/apache/ApiClient.java

Co-authored-by: Charles Dubois <103174266+CharlesDuboisSAP@users.noreply.github.com>

Author: rpanackal

datamodel/openapi/openapi-core/src/main/java/com/sap/cloud/sdk/services/openapi/apache/ApiClient.java

@@ -526,9 +526,9 @@ private static boolean isBodyAllowed( @Nonnull final Method method )
     public <T> T invokeAPI(
         @Nonnull final String path,
         @Nonnull final String method,
-        @Nonnull final List<Pair> queryParams,
-        @Nonnull final List<Pair> collectionQueryParams,
-        @Nonnull final String urlQueryDeepObject,
+        @Nullable final List<Pair> queryParams,
+        @Nullable final List<Pair> collectionQueryParams,
+        @Nullable final String urlQueryDeepObject,
         @Nullable final Object body,
         @Nonnull final Map<String, String> headerParams,
         @Nonnull final Map<String, Object> formParams,