docs: public DbxClientV2 asAdmin(String adminId) {
          if (adminId == null) {
              throw new IllegalArgumentException("'adminId' should not be null");
          }
  
          DbxRawClientV2 asAdminClient = new DbxTeamRawClientV2(
              _client.getRequestConfig(),
              credential,
              _client.getHost(),
              _client.getUserId(),
              null,
              adminId,
              null
          );
          return new DbxClientV2(asAdminClient);
      }