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: aquatic_buffer_validator.rb
    path of file: ./repos/ekylibre/app/services/interventions/phytosanitary
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Interventions
  module Phytosanitary
    class AquaticBufferValidator < ProductApplicationValidator
      # @param [Array<Models::ProductWithUsage>] products_usages
      # @return [Models::ProductApplicationResult]
      def validate(products_usages)
        result = Models::ProductApplicationResult.new
        return result if products_usages.length == 1

        products_usages
          .select { |pr
    
      def validate(products_usages)
        result = Models::ProductApplicationResult.new
        return result if products_usages.length == 1

        products_usages
          .select { |prod_usage| prod_usage.usage.present? && prod_usage.usage.untreated_buffer_aquatic.present? && prod_usage.usage.untreated_buffer_aquatic >= 100 }
          .each do |prod_usage|
            usage = prod_usage.usage
            product = prod_usage.product
            message = :substances_mixing_not_allowed_due_to_znt_buffer.tl(usage: usage.crop_label_fra, phyto: product.name)

            result = result.merge(declare_forbidden_mix(product, with: products_usages.map(&:product), message: message))
            result.vote_forbidden(product, message)
          end

        result
      end