1type Query {
 2    """Access a repository by reference/name. If no ref is given, the default repository is returned if any."""
 3    repository(ref: String): Repository
 4}
 5
 6type Mutation {
 7    """Create a new bug"""
 8    newBug(input: NewBugInput!, txId: TxId): NewBugPayload!
 9    """Add a new comment to a bug"""
10    addComment(input: AddCommentInput!, txId: TxId): AddCommentPayload!
11    """Add or remove a set of label on a bug"""
12    changeLabels(input: ChangeLabelInput!, txId: TxId): ChangeLabelPayload!
13    """Change a bug's status to open"""
14    openBug(input: OpenBugInput!, txId: TxId): OpenBugPayload!
15    """Change a bug's status to closed"""
16    closeBug(input: CloseBugInput!, txId: TxId): CloseBugPayload!
17    """Change a bug's title"""
18    setTitle(input: SetTitleInput!, txId: TxId): SetTitlePayload!
19
20    """Start a transaction.
21    If a transaction ID if passed to the mutation, operation are accumulated
22    in memory until a commit happen.
23    """
24    startTransaction(input: StartTransactionInput!): StartTransactionPayload!
25    """Commit a transaction. All mutation linked to this transaction are written on disk."""
26    commit(input: CommitInput!): CommitPayload!
27    """Rollback a transaction. Alll mutationlinked to this transaction are discarded."""
28    rollback(input: RollbackInput!): RollbackPayload!
29}