Type Alias EngineFactory 

pub type EngineFactory = Box<dyn Fn() -> EngineState>;

Builds a fresh engine for a new document — the platform runner, the viewcube, and the persisted display settings, all applied before anything is loaded into it. Injected by the shell so tests (which need the SYNCHRONOUS inline runner) can construct documents without a background thread.

Aliased Type

pub struct EngineFactory(/* private fields */);