feat(clients): add helper to check if an index exists (generated)

algolia/api-clients-automation#3646

Co-authored-by: algolia-bot <accounts+algolia-api-client-bot@algolia.com>
Co-authored-by: Pierre Millot <pierre.millot@algolia.com>
Co-authored-by: Thomas Raffray <Fluf22@users.noreply.github.com>

algoliasearch/src/main/java/com/algolia/api/SearchClient.java

@@ -6743,4 +6743,16 @@ public Duration getSecuredApiKeyRemainingValidity(@Nonnull String securedApiKey)
 
     return Duration.ofSeconds(timeStamp - Instant.now().getEpochSecond());
   }
+
+  public boolean indexExists(String indexName) {
+    try {
+      getSettings(indexName);
+    } catch (AlgoliaApiException e) {
+      if (e.getStatusCode() == 404) {
+        return false;
+      }
+      throw e;
+    }
+    return true;
+  }
 }