module Grape::Helpers::ActiveModelSerializers

def render(resource, active_model_serializer_options = {})

Example: To include pagination meta data: render(posts, meta: { page: posts.page, total_pages: posts.total_pages })

Example: To include relationships in the response: render(post, include: ['comments'])

A convenience method for passing ActiveModelSerializers serializer options 
def render(resource, active_model_serializer_options = {})
  env[:active_model_serializer_options] = active_model_serializer_options
  resource
end