# Verify a symbol exists · Dola AI

Engine API reference

# Verify a symbol exists

Checks that a class, function, or property really exists in your engine version before Dola uses it, to avoid invented APIs.

Last updated 10 October 2026

Status: Live

## [When to use it](#when)

Dola checks names during Blueprint and editor work; ask for it before C++ work or when you doubt an API from elsewhere.

## [Example prompts](#examples)

Type requests like these in the Dola chat:

- Does UKismetSystemLibrary have LineTraceSingle?

- Is FVector::DistSquared2D available in 5.7?

## [What you need](#requirements)

- The Dola desktop app, signed in, with your Unreal project attached

## [Safety notes](#safety)

- Read-only: it looks at your project and does not change it.

## [Related](#related)

- All [Engine API reference](https://dolaai.pro/docs/tools/engine-api) tools, including [Search the Engine API](https://dolaai.pro/docs/tools/engine-api/search-api), [Class functions and properties](https://dolaai.pro/docs/tools/engine-api/class-api), [Blueprint-exposed functions](https://dolaai.pro/docs/tools/engine-api/bp-nodes)

- Guide: [First Blueprint workflow](https://dolaai.pro/docs/first-blueprint)

- Guide: [First C++ assistance](https://dolaai.pro/docs/first-cpp)

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