docs: private void mergeMappings(TypeMap<?, ?> destinationMap) {
      for (Mapping mapping : destinationMap.getMappings()) {
        InternalMapping internalMapping = (InternalMapping) mapping;
        mergedMappings.add(internalMapping.createMergedCopy(
            propertyNameInfo.getSourceProperties(), propertyNameInfo.getDestinationProperties()));
      }
    }