Applies a given primitive operation to a feature model. Utilizes the feature model implementation.

Asserts that no competing operations add children to the targeted feature. Required to ensure the preconditions of kernel.core.compound-operation/remove-feature. This assertion operation has no actual execution effect on the feature model, it only affects the conflict detection.

Creates a new constraint.

Creates a new feature in the feature tree that is assumed to have the default values defined in kernel.core.feature-model. Newly created features are not part of the feature tree until explicitly inserted.

Returns the attribute of a feature that an update PO targets.

Returns the current value of a targeted constraint attribute in a given feature model.

Returns the current value of a targeted feature attribute in a given feature model.

Returns the identifier in the feature model that an update PO targets.

Returns the key of a metadata PO.

Returns the new value of a feature attribute that an update PO targets.

Returns the old value of a feature attribute that an update PO targets.

Returns the type of a primitive operation.

Returns the key of a metadata PO.

Generates an inverse for a primitive operation. An inverse nullifies the original operation’s execution effect. Inverting an inverse yields the original operation.

Create operations do not visibly affect the feature model, they only add an entry to the feature tree/constraint map. As such, inverting a create operation does not do anything and can be a nop.

Update operations are inverted by swapping their old and new values.

Assert operations are kept unchanged as discussed in kernel.core.compound-operation/remove-feature.

Adds metadata, such as a human-readable description, to a compound operation. Has no execution effect and does not affect conflict detection. All of these are only used for UI purposes.

Currently supported keys: - :inverted signifies whether an operation has been inverted - :description is a human-readable description of a CO - :icon is an (Office UI Fabric) icon associated with this CO

An operation that does nothing. Is filtered out when building a compound operation. Useful for nullifying the effect of an operation when inverting it.

Removes all nop operations from a sequence of primitive operations.

Updates a single attribute of a constraint. For conflict detection and undo/redo, it is also necessary to store an attribute’s old value for every update.

Updates a single attribute of a feature. For conflict detection and undo/redo, it is also necessary to store an attribute’s old value for every update.