The values must be `unique_or_identical:unique_or_identical` at depth `depth_level:d`

NOTE: depth_level is not processed via this step implementation but it does affect instance selection
within the @gherkin_ifc.step decorator.
see validation_handling.py:299

Usages:

Then The values must be identical at depth 3

ALS011 Alignment segment entity type consistency - v3:27

Then The values must be identical at depth 3

ALS011 Alignment segment entity type consistency - v3:44

Then The values must be unique at depth 1

GEM003 Unique representation identifier - v1:15

Then The values must be identical at depth 3

GEM011 Curve segments consistency - v2:27

Then The values must be identical at depth 0

GRF001 Identical coordinate operations - v2:17

Then the values must be identical at depth 1

MPD001 Correct use of RepresentationType and RepresentationIdentifier in the context of IfcMappedItem - v1:30