code: public List<FunctionWrapper> compileFunctions(
        ImportStack importStack, Context context, List<?> objects
    ) {
      List<FunctionWrapper> callbacks = new LinkedList<>();
  
      for (Object object : objects) {
        List<FunctionWrapper> objectCallbacks = compileFunctions(importStack, context, object);
  
        callbacks.addAll(objectCallbacks);
      }
  
      return callbacks;
    }
docs: Compile methods from all objects into libsass functions.
  
  @param importStack The import stack.
  @param objects     A list of "function provider" objects.
  @return The newly created list of libsass callbacks.