plannerBucket resource type
Represents a bucket (or "custom column") for tasks in a plan in Microsoft 365. It is contained in a plannerPlan and can have a collection of plannerTasks.
||Read-only. ID of the bucket. It is 28 characters long and case-sensitive. Format validation is done on the service.
||Name of the bucket.
||Hint used to order items of this type in a list view. For details about the supported format, see Using order hints in Planner.
||Plan ID to which the bucket belongs.
||Read-only. Nullable. The collection of tasks in the bucket.
Here's a JSON representation of the resource.
"id": "String (identifier)",