Experimental `getDiagnostics` request (#24480).

pkg/analysis_server/test/integration/protocol_matchers.dart

 // Copyright (c) 2014, 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".
 
 /**
  * Matchers for data types defined in the analysis server API
@@ skipping 989 matching lines @@
  */
 final Matcher isExecutionLaunchDataParams = new LazyMatcher(() => new MatchesJsonObject(
   "execution.launchData params", {
     "file": isFilePath
   }, optionalFields: {
     "kind": isExecutableKind,
     "referencedFiles": isListOf(isFilePath)
   }));
 
 /**
+ * experimental.getDiagnostics params
+ */
+final Matcher isExperimentalGetDiagnosticsParams = isNull;
+
+/**
+ * experimental.getDiagnostics result
+ *
+ * {
+ *   "contexts": List<ContextData>
+ * }
+ */
+final Matcher isExperimentalGetDiagnosticsResult = new LazyMatcher(() => new MatchesJsonObject(
+  "experimental.getDiagnostics result", {
+    "contexts": isListOf(isContextData)
+  }));
+
+/**
  * AddContentOverlay
  *
  * {
  *   "type": "add"
  *   "content": String
  * }
  */
 final Matcher isAddContentOverlay = new LazyMatcher(() => new MatchesJsonObject(
   "AddContentOverlay", {
     "type": equals("add"),
@@ skipping 232 matching lines @@
   "IMPORT",
   "IDENTIFIER",
   "INVOCATION",
   "KEYWORD",
   "NAMED_ARGUMENT",
   "OPTIONAL_ARGUMENT",
   "PARAMETER"
 ]);
 
 /**
+ * ContextData
+ *
+ * {
+ *   "name": String
+ *   "explicitFileCount": int
+ *   "implicitFileCount": int
+ *   "workItemQueueLength": int
+ *   "cacheEntryExceptions": List<String>
+ * }
+ */
+final Matcher isContextData = new LazyMatcher(() => new MatchesJsonObject(
+  "ContextData", {
+    "name": isString,
+    "explicitFileCount": isInt,
+    "implicitFileCount": isInt,
+    "workItemQueueLength": isInt,
+    "cacheEntryExceptions": isListOf(isString)
+  }));
+
+/**
  * Element
  *
  * {
  *   "kind": ElementKind
  *   "name": String
  *   "location": optional Location
  *   "flags": int
  *   "parameters": optional String
  *   "returnType": optional String
  *   "typeParameters": optional String
@@ skipping 1138 matching lines @@
  *
  * {
  *   "newName": String
  * }
  */
 final Matcher isRenameOptions = new LazyMatcher(() => new MatchesJsonObject(
   "rename options", {
     "newName": isString
   }));