Update edit.importElements response data to support part files

pkg/analysis_server/lib/protocol/protocol_constants.dart

 // Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 //
 // This file has been automatically generated.  Please do not edit it manually.
 // To regenerate the file, use the script
 // "pkg/analysis_server/tool/spec/generate_files".
 
 const String ANALYSIS_NOTIFICATION_ANALYZED_FILES = 'analysis.analyzedFiles';
 const String ANALYSIS_NOTIFICATION_ANALYZED_FILES_DIRECTORIES = 'directories';
@@ skipping 163 matching lines @@
 const String EDIT_RESPONSE_GET_POSTFIX_COMPLETION_CHANGE = 'change';
 const String EDIT_RESPONSE_GET_REFACTORING_CHANGE = 'change';
 const String EDIT_RESPONSE_GET_REFACTORING_FEEDBACK = 'feedback';
 const String EDIT_RESPONSE_GET_REFACTORING_FINAL_PROBLEMS = 'finalProblems';
 const String EDIT_RESPONSE_GET_REFACTORING_INITIAL_PROBLEMS = 'initialProblems';
 const String EDIT_RESPONSE_GET_REFACTORING_OPTIONS_PROBLEMS = 'optionsProblems';
 const String EDIT_RESPONSE_GET_REFACTORING_POTENTIAL_EDITS = 'potentialEdits';
 const String EDIT_RESPONSE_GET_STATEMENT_COMPLETION_CHANGE = 'change';
 const String EDIT_RESPONSE_GET_STATEMENT_COMPLETION_WHITESPACE_ONLY =
     'whitespaceOnly';
-const String EDIT_RESPONSE_IMPORT_ELEMENTS_EDITS = 'edits';
+const String EDIT_RESPONSE_IMPORT_ELEMENTS_EDIT = 'edit';
 const String EDIT_RESPONSE_IS_POSTFIX_COMPLETION_APPLICABLE_VALUE = 'value';
 const String EDIT_RESPONSE_LIST_POSTFIX_COMPLETION_TEMPLATES_TEMPLATES =
     'templates';
 const String EDIT_RESPONSE_ORGANIZE_DIRECTIVES_EDIT = 'edit';
 const String EDIT_RESPONSE_SORT_MEMBERS_EDIT = 'edit';
 const String EXECUTION_NOTIFICATION_LAUNCH_DATA = 'execution.launchData';
 const String EXECUTION_NOTIFICATION_LAUNCH_DATA_FILE = 'file';
 const String EXECUTION_NOTIFICATION_LAUNCH_DATA_KIND = 'kind';
 const String EXECUTION_NOTIFICATION_LAUNCH_DATA_REFERENCED_FILES =
     'referencedFiles';
@@ skipping 54 matching lines @@
 const String SERVER_NOTIFICATION_ERROR_MESSAGE = 'message';
 const String SERVER_NOTIFICATION_ERROR_STACK_TRACE = 'stackTrace';
 const String SERVER_NOTIFICATION_STATUS = 'server.status';
 const String SERVER_NOTIFICATION_STATUS_ANALYSIS = 'analysis';
 const String SERVER_NOTIFICATION_STATUS_PUB = 'pub';
 const String SERVER_REQUEST_GET_VERSION = 'server.getVersion';
 const String SERVER_REQUEST_SET_SUBSCRIPTIONS = 'server.setSubscriptions';
 const String SERVER_REQUEST_SET_SUBSCRIPTIONS_SUBSCRIPTIONS = 'subscriptions';
 const String SERVER_REQUEST_SHUTDOWN = 'server.shutdown';
 const String SERVER_RESPONSE_GET_VERSION_VERSION = 'version';