You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: destroy_garden_crop.rb
    path of file: ./repos/OpenFarm/app/mutations/garden_crops
    
    the code of the file until where you have to start completion: module GardenCrops
  clas
    
    def find_garden_crop
      @garden_crop = Garden.find(garden_id).
          garden_crops.find(id)
    rescue Mongoid::Errors::DocumentNotFound
      msg = "Could not find a garden_crop with id #{id}."
      add_error :garden_crop, :garden_crop_not_found, msg
    end