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: input_object_names_are_unique.rb
    path of file: ./repos/graphql-ruby/lib/graphql/static_validation/rules
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
module GraphQL
  module StaticValidation
    module InputObjectNamesAreUnique
      def on_input_object(node, parent)
        validate_input_fields(node)
        super
      end

      private

      def validate_input_fields(node)
        input_field_defns = node.arguments
        input_fields_by_name = Hash.new { |h, k| h[k] = [] }
        input_field_defns.each { |a| input_fields_by_name[a.name] << a }

       
    
      def validate_input_fields(node)
        input_field_defns = node.arguments
        input_fields_by_name = Hash.new { |h, k| h[k] = [] }
        input_field_defns.each { |a| input_fields_by_name[a.name] << a }

        input_fields_by_name.each do |name, defns|
          if defns.size > 1
            error = GraphQL::StaticValidation::InputObjectNamesAreUniqueError.new(
              "There can be only one input field named \"#{name}\"",
              nodes: defns,
              name: name
            )
            add_error(error)
          end
        end