Reapply "Add support for generic function type syntax, part 1"

pkg/analysis_server/lib/src/services/completion/dart/optype.dart

Index: pkg/analysis_server/lib/src/services/completion/dart/optype.dart
diff --git a/pkg/analysis_server/lib/src/services/completion/dart/optype.dart b/pkg/analysis_server/lib/src/services/completion/dart/optype.dart
index da0e6a03ef924391f368ac76c93b13d8bb24bead..c9954d5caea2741268c9f065248b9c4eb096fc1d 100644
--- a/pkg/analysis_server/lib/src/services/completion/dart/optype.dart
+++ b/pkg/analysis_server/lib/src/services/completion/dart/optype.dart
@@ -126,15 +126,6 @@ class OpType {
   OpType._();
 
   /**
-   * Indicate whether only type names should be suggested
-   */
-  bool get includeOnlyNamedArgumentSuggestions =>
-      includeNamedArgumentSuggestions &&
-      !includeTypeNameSuggestions &&
-      !includeReturnValueSuggestions &&
-      !includeVoidReturnSuggestions;
-
-  /**
    * Return `true` if free standing identifiers should be suggested
    */
   bool get includeIdentifiers {
@@ -148,6 +139,15 @@ class OpType {
   /**
    * Indicate whether only type names should be suggested
    */
+  bool get includeOnlyNamedArgumentSuggestions =>
+      includeNamedArgumentSuggestions &&
+      !includeTypeNameSuggestions &&
+      !includeReturnValueSuggestions &&
+      !includeVoidReturnSuggestions;
+
+  /**
+   * Indicate whether only type names should be suggested
+   */
   bool get includeOnlyTypeNameSuggestions =>
       includeTypeNameSuggestions &&
       !includeNamedArgumentSuggestions &&
@@ -845,9 +845,9 @@ class _OpTypeAstVisitor extends GeneralizingAstVisitor {
 
   @override
   void visitTypeArgumentList(TypeArgumentList node) {
-    NodeList<TypeName> arguments = node.arguments;
-    for (TypeName typeName in arguments) {
-      if (identical(entity, typeName)) {
+    NodeList<TypeAnnotation> arguments = node.arguments;
+    for (TypeAnnotation type in arguments) {
+      if (identical(entity, type)) {
         optype.includeTypeNameSuggestions = true;
         break;
       }