'declare method' quick fix for adding a private method

Description

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

Contributor guide

Tech stack

typescript

Domain

tooling

Issue type

feature

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

3

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

1-2 days

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

stale

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

mostly clear

Prerequisites

Understanding of TypeScript compiler codebaseKnowledge of quick fix infrastructure

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

40

Research direction

The issue requests a quick fix to add a private method, similar to the existing quick fix for private properties implemented in issue #36249. To implement this, one should examine the code for that existing fix, likely located in src/services/codefixes/, and understand how it suggests property declarations. The implementation will need to generate a method declaration with the correct access modifier and signature. Relevant files include the codefixes module and possibly the type checker for method lookup.