anchor.diff:    """A unique identifier for the client performing the mutation."""
     clientMutationId: String
   
  -  """The edge from the subject's comment connection."""
  +  """
  +  The edge from the subject's comment connection.
  +  
  +  **Upcoming Change on 2019-01-01 UTC**
  +  **Description:** Type for `commentEdge` will change from `IssueCommentEdge!` to `IssueCommentEdge`.
  +  **Reason:** In preparation for an upcoming change to the way we report
  +  mutation errors, non-nullable payload fields are becoming nullable.
  +  
  +  """
     commentEdge: IssueCommentEdge!
   
  -  """The subject"""
  +  """
  +  The subject
  +  
  +  **Upcoming Change on 2019-01-01 UTC**
  +  **Description:** Type for `subject` will change from `Node!` to `Node`.
  +  **Reason:** In preparation for an upcoming change to the way we report
  +  mutation errors, non-nullable payload fields are becoming nullable.
  +  
  +  """
     subject: Node!
   
  -  """The edge from the subject's timeline connection."""
  +  """
  +  The edge from the subject's timeline connection.
  +  
  +  **Upcoming Change on 2019-01-01 UTC**
  +  **Description:** Type for `timelineEdge` will change from `IssueTimelineItemEdge!` to `IssueTimelineItemEdge`.
  +  **Reason:** In preparation for an upcoming change to the way we report
  +  mutation errors, non-nullable payload fields are becoming nullable.
  +  
  +  """
     timelineEdge: IssueTimelineItemEdge!
   }
   
  
positive.code:   """A unique identifier for the client performing the mutation."""
    clientMutationId: String
  
    """The input subscribable entity."""
    subscribable: Subscribable!
  }
  
  
negative.code:   """A unique identifier for the client performing the mutation."""
    clientMutationId: String
  
    """
    The updated project.
    
    **Upcoming Change on 2019-01-01 UTC**
    **Description:** Type for `project` will change from `Project!` to `Project`.
    **Reason:** In preparation for an upcoming change to the way we report
    mutation errors, non-nullable payload fields are becoming nullable.
    
    """
    project: Project!
  }
  
  