From microsoft/vscode#94118

TypeScript Version: 3.9.0-dev.20200330

Search terms

• quick fix
• declare method
• private

Repro
For ts file:

index.ts

class Bar {
    bar() {
         this._baz(123)
    }
}

1. Trigger quick fixes on _baz

Feature request:
#36249 added a quick fix for adding private properties. However there is no quick fix for adding a private method

Playground Link:

Related Issues:

• Declare property quick fix should add private properties (or be configurable)  #36249