pending.addAll(dependencies.get(cls));
            }
        }

        Set<String> usedConstantSources = compilerApiData.isSupportsConstantsMapping()
            ? compilerApiData.getConstantToClassMapping().getConstantDependents().keySet()
            : classesToConstants.keySet();

        usedClasses.addAll(usedConstantSources);

        Map<String, HashCode> classHashes = new HashMap<>(usedClasses.size());