@RequiresSession
  public RoleAuthorizationEntity findById(String id) {
    return entityManagerProvider.get().find(RoleAuthorizationEntity.class, id);
  }
Find a authorization entity with the given id.

@param id type id
@return a matching authorization entity or null
ambari-server/src/main/java/org/apache/ambari/server/orm/dao/RoleAuthorizationDAO.java