anchor.diff:  
     """Update a Git Ref."""
     updateRef(input: UpdateRefInput!): UpdateRefPayload
  +
  +  """Update information about a repository."""
  +  updateRepository(input: UpdateRepositoryInput!): UpdateRepositoryPayload
   
     """Updates the state for subscribable subjects."""
     updateSubscription(input: UpdateSubscriptionInput!): UpdateSubscriptionPayload
  
positive.code:   """The description of project."""
    body: String
  
    """A unique identifier for the client performing the mutation."""
    clientMutationId: String
  }
  
negative.code:   """Lock a lockable object"""
    lockLockable(input: LockLockableInput!): LockLockablePayload
  
    """Merge a head into a branch."""
    mergeBranch(input: MergeBranchInput!): MergeBranchPayload
  
    """Merge a pull request."""
    mergePullRequest(input: MergePullRequestInput!): MergePullRequestPayload
  
  