@Nonnull
	public Stream<Pair<ClassPathNode, ClassPathNode>> streamPreToPostMappingPaths() {
		return getPreMappingPaths().values().stream()
				.map(p -> new Pair<>(p, getPostMappingPath(p.getValue().getName())));
	}
@return Stream of mapped path pairs.
The {@link Pair#getLeft()} holds the pre-mapped path.
The {@link Pair#getRight()} holds the post-mapped path, which may be {@code null} in some cases.
recaf-core/src/main/java/software/coley/recaf/services/mapping/MappingResults.java