Move completion APIs to a private location

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

Index: pkg/analysis_server/lib/src/services/completion/optype.dart
diff --git a/pkg/analysis_server/lib/src/services/completion/optype.dart b/pkg/analysis_server/lib/src/services/completion/optype.dart
index 5a04322fbad0cd195c0434f6f8ac5cdf11dc9dc9..dc389196d50bfe94e5b9dda83994b2bbe7cde43f 100644
--- a/pkg/analysis_server/lib/src/services/completion/optype.dart
+++ b/pkg/analysis_server/lib/src/services/completion/optype.dart
@@ -4,7 +4,7 @@
 
 library services.completion.dart.optype;
 
-import 'package:analysis_server/completion/dart/completion_target.dart';
+import 'package:analysis_server/src/provisional/completion/dart/completion_target.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/scanner.dart';
 
@@ -295,6 +295,16 @@ class _OpTypeAstVisitor extends GeneralizingAstVisitor {
   }
 
   @override
+  void visitFieldFormalParameter(FieldFormalParameter node) {
+    if (entity == node.identifier) {
+      optype.isPrefixed = true;
+    } else {
+      optype.includeReturnValueSuggestions = true;
+      optype.includeTypeNameSuggestions = true;
+    }
+  }
+
+  @override
   void visitForEachStatement(ForEachStatement node) {
     if (identical(entity, node.identifier)) {
       optype.includeTypeNameSuggestions = true;
@@ -449,16 +459,6 @@ class _OpTypeAstVisitor extends GeneralizingAstVisitor {
   }
 
   @override
-  void visitFieldFormalParameter(FieldFormalParameter node) {
-    if (entity == node.identifier) {
-      optype.isPrefixed = true;
-    } else {
-      optype.includeReturnValueSuggestions = true;
-      optype.includeTypeNameSuggestions = true;
-    }
-  }
-
-  @override
   void visitNormalFormalParameter(NormalFormalParameter node) {
     optype.includeReturnValueSuggestions = true;
     optype.includeTypeNameSuggestions = true;