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: result.rb
    path of file: ./repos/mongo-ruby-driver/lib/mongo/operation
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
# rubocop:todo all

# Copyright (C) 2014-2020 MongoDB Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

require 'mongo/operation/shared/result/aggregatable'
require 'mongo/operation/shared/result/use_legacy_error_parser'

module Mongo
  module Operation

    # Result wrapper for wire protocol replies.
    #
    # An operation has zero or one replies. The only operati
    
      def ok?
        # first_document[OK] is a float, and the server can return
        # ok as a BSON int32, BSON int64 or a BSON double.
        # The number 1 is exactly representable in a float, hence
        # 1.0 == 1 is going to perform correctly all of the time
        # (until the server returns something other than 1 for success, that is)
        first_document[OK] == 1
      end

      # Validate the result by checking for any errors.
      #
      # @note This only checks for errors with writes since authentication is
      #   handled at the connection level and any authentication errors would
      #   be raised there, before a Result is ever created.
      #
      # @example Validate the result.
      #   result.validate!
      #
      # @raise [ Error::OperationFailure ] If an error is in the result.
      #
      # @return [ Result ] The result if verification passed.
      #
      # @since 2.0.0
      # @api private
      def validate!
        !successful? ? raise_operation_failure : self
      end

      # The exception instance (of the Error::OperationFailure class)
      # that would be raised during processing of this result.
      #
      # This method should only be called when result is not successful.
      #
      # @return [ Error::OperationFailure ] The exception.
      #
      # @api private
      def error
        @error ||= Error::OperationFailure.new(
          parser.message,
          self,
          code: parser.code,
          code_name: parser.code_name,
          write_concern_error_document: parser.write_concern_error_document,
          write_concern_error_code: parser.write_concern_error_code,
          write_concern_error_code_name: parser.write_concern_error_code_name,
          write_concern_error_labels: parser.write_concern_error_labels,
          labels: parser.labels,
          wtimeout: parser.wtimeout,
          connection_description: connection_description,
          document: parser.document,
          server_message: parser.server_message,
        )
      end

      # Raises a Mongo::OperationFailure exception corresponding to the
      # error information in this result.
      #
      # @raise Error::OperationFailure
      private def raise_operation_failure
        raise error
      end