code: function FileMediatorService(mediator, config) {
    this.mediator = mediator;
    this.config = config || {};
    
    this.usersTopics = new MediatorTopicUtility(mediator).prefix(CONSTANTS.TOPIC_PREFIX).entity(CONSTANTS.USERS_ENTITY_NAME);
    this.filesTopics = new MediatorTopicUtility(mediator).prefix(CONSTANTS.TOPIC_PREFIX).entity(CONSTANTS.FILES_ENTITY_NAME);
    this.fileUITopics = new MediatorTopicUtility(mediator).prefix(CONSTANTS.FILE_UI_TOPIC_PREFIX).entity(CONSTANTS.FILE);
  }
docs: A mediator service that will publish and subscribe to topics to be able to render file data.
  
  @param {Mediator} mediator
  @param {object}   config
  @constructor