code: @Deprecated
      public static Wootric init(FragmentActivity fragmentActivity, String clientId, String clientSecret, String accountToken) {
          Wootric local = singleton;
          if(local == null) {
              synchronized (Wootric.class) {
                  local = singleton;
                  if(local == null) {
                      checkNotNull(fragmentActivity, "FragmentActivity");
                      checkNotNull(clientId, "Client Id");
                      checkNotNull(clientSecret, "Client Secret");
                      checkNotNull(accountToken, "Account Token");
                      singleton = local = new Wootric(fragmentActivity, clientId, clientSecret, accountToken);
                  }
              }
          }
  
          return local;
      }
docs: It configures the SDK with required parameters.
  
  @param fragmentActivity FragmentActivity where the survey will be presented.
  @param clientId Found in API section of the Wootric's admin panel.
  @param clientSecret Found in API section of the Wootric's admin panel.
  @param accountToken Found in Install section of the Wootric's admin panel.