Remove nonpublic members from destructuring completion lists

src/services/completions.ts

@@ -1002,7 +1002,7 @@ namespace ts.Completions {
                     const typeForObject = typeChecker.getTypeAtLocation(objectLikeContainer);
                     if (!typeForObject) return false;
                     // In a binding pattern, get only known properties. Everywhere else we will get all possible properties.
-                    typeMembers = typeChecker.getPropertiesOfType(typeForObject);
+                    typeMembers = typeChecker.getPropertiesOfType(typeForObject).filter((symbol) => !(getDeclarationModifierFlagsFromSymbol(symbol) & ModifierFlags.NonPublicAccessibilityModifier));
                     existingMembers = (<ObjectBindingPattern>objectLikeContainer).elements;
                 }
             }

tests/cases/fourslash/completionListInObjectBindingPattern14.ts

@@ -0,0 +1,9 @@
+/// <reference path="fourslash.ts"/>
+
+////const { b/**/ } = new class {
+////    private ab;
+////    protected bc;
+////}
+
+goTo.marker();
+verify.completionListIsEmpty();