module documentation

Mixins related to OPC UA spatial objects (Relative Spatial Location information model).

Both place their spatial objects in the Monitoring container, so MonitoringMixin for each is required.

See https://reference.opcfoundation.org/specs/OPC-10000-210/full

Class SpatialObjectListMixin Mixin for BaseMachine that has an OPC UA SpatialObjectList.
Class SpatialObjectMixin Mixin for BaseMachineryItem that has an OPC UA SpatialObject.