code: public java.util.List<String> getAddAllowedPrincipals() {
          if (addAllowedPrincipals == null) {
              addAllowedPrincipals = new com.amazonaws.internal.SdkInternalList<String>();
          }
          return addAllowedPrincipals;
      }
docs: <p>
  The Amazon Resource Names (ARN) of one or more principals. Permissions are granted to the principals in this
  list. To grant permissions to all principals, specify an asterisk (*).
  </p>
  
  @return The Amazon Resource Names (ARN) of one or more principals. Permissions are granted to the principals in
  this list. To grant permissions to all principals, specify an asterisk (*).