traceSupplier

Wraps a no-arg [Supplier] with LangSmith tracing. This is the recommended entry point for Java callers (0-arg). It avoids the overload-resolution ambiguity that can occur with [traceable] when Kotlin function types are on the classpath. Kotlin callers should prefer [traceable] directly.

TraceConfig config = TraceConfig.builder()
    .name("fetch-answer")
    .client(LangsmithOkHttpClient.fromEnv())
    .build();
Supplier traced = Tracing.traceSupplier(() -> "42", config);
String result = traced.get();