anchor.diff:      """List only the activities between the specific time range."""
       dateRange: TimeRangeInput
     ): [Analytics]
  +
  +  """Message event type"""
  +  articleType: ArticleTypeEnum!
  +
  +  """Attachment of this article"""
  +  attachmentUrl: String
  +
  +  """Attachment hash to search or identify files"""
  +  attachmentHash: String
   }
   
   """Basic entity. Modeled after Relay's GraphQL Server Specification."""
  
positive.code: 
    """List the articles with replies of certain types"""
    replyTypes: [ReplyTypeEnum]
  }
  
  """
  
negative.code:   webVisit: Int
  }
  
  enum ArticleTypeEnum {
    TEXT
    IMAGE
    VIDEO
    AUDIO
  }
  
  input ListArticleFilter {
    """Show only articles created by a specific app."""
    appId: String
  