code: private boolean areImplicitGlobalClientsDisabled() {
          String setting = System.getProperty(SDKGlobalConfiguration.DISABLE_S3_IMPLICIT_GLOBAL_CLIENTS_SYSTEM_PROPERTY);
          return setting != null && !setting.equals("false");
      }
docs: Returns true in the event that the {@link SDKGlobalConfiguration#DISABLE_S3_IMPLICIT_GLOBAL_CLIENTS_SYSTEM_PROPERTY}
  is non-null and not "false".
  
  If this system property is set, S3 clients may not act in a cross-region manner unless cross-region behavior is
  explicitly enabled, using options like {@link AmazonS3ClientBuilder#enableForceGlobalBucketAccess()}.