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docs/build/snippets/python/code-samples/ls-metadata-parameters-basic-java.mdx
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2026-07-29 10:28:19 +00:00

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```java Java
import com.langchain.smith.tracing.RunType;
import com.langchain.smith.tracing.TraceConfig;
import com.langchain.smith.tracing.Tracing;
import java.util.HashMap;
import java.util.Map;
import java.util.function.Function;
Map<String, Object> metadata = new HashMap<>();
metadata.put("ls_provider", "my_provider");
metadata.put("ls_model_name", "my_custom_model");
Function<String, String> myCustomLlm =
Tracing.traceFunction(
prompt -> callCustomApi(prompt),
TraceConfig.builder()
.runType(RunType.LLM)
.metadata(metadata)
.build());
```