Issue 26460. Add Quick Fix for missing 'Function.call()' implementation.

pkg/analysis_server/lib/src/services/correction/fix.dart

Index: pkg/analysis_server/lib/src/services/correction/fix.dart
diff --git a/pkg/analysis_server/lib/src/services/correction/fix.dart b/pkg/analysis_server/lib/src/services/correction/fix.dart
index 49d616deb26b0a0f772b8a174a26239c524befd7..20ca00fb229f7887849f40c0a013143d6f1bfed9 100644
--- a/pkg/analysis_server/lib/src/services/correction/fix.dart
+++ b/pkg/analysis_server/lib/src/services/correction/fix.dart
@@ -70,6 +70,7 @@ bool hasFix(ErrorCode errorCode) =>
     errorCode == StaticWarningCode.FINAL_NOT_INITIALIZED_CONSTRUCTOR_1 ||
     errorCode == StaticWarningCode.FINAL_NOT_INITIALIZED_CONSTRUCTOR_2 ||
     errorCode == StaticWarningCode.FINAL_NOT_INITIALIZED_CONSTRUCTOR_3_PLUS ||
+    errorCode == StaticWarningCode.FUNCTION_WITHOUT_CALL ||
     errorCode == StaticWarningCode.UNDEFINED_IDENTIFIER ||
     errorCode ==
         CompileTimeErrorCode.CONST_INITIALIZED_WITH_NON_CONSTANT_VALUE ||
@@ -154,6 +155,8 @@ class DartFixKind {
       const FixKind('CREATE_LOCAL_VARIABLE', 50, "Create local variable '{0}'");
   static const CREATE_METHOD =
       const FixKind('CREATE_METHOD', 50, "Create method '{0}'");
+  static const CREATE_MISSING_METHOD_CALL =
+      const FixKind('CREATE_MISSING_METHOD_CALL', 49, "Create method 'call'.");
   static const CREATE_MISSING_OVERRIDES = const FixKind(
       'CREATE_MISSING_OVERRIDES', 49, "Create {0} missing override(s)");
   static const CREATE_NO_SUCH_METHOD = const FixKind(