extend type Mutation {
  createTaskGroup(input: NewTaskGroup!): TaskGroup!
  updateTaskGroupLocation(input: NewTaskGroupLocation!): TaskGroup!
  updateTaskGroupName(input: UpdateTaskGroupName!): TaskGroup!
  deleteTaskGroup(input: DeleteTaskGroupInput!): DeleteTaskGroupPayload!
}

input NewTaskGroupLocation {
  taskGroupID: UUID!
  position: Float!
}

input UpdateTaskGroupName  {
  taskGroupID: UUID!
  name: String!
}

input DeleteTaskGroupInput {
  taskGroupID: UUID!
}

type DeleteTaskGroupPayload {
  ok: Boolean!
  affectedRows: Int!
  taskGroup: TaskGroup!
}

input NewTaskGroup {
  projectID: String!
  name: String!
  position: Float!
}