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feat(gax): implement actionable errors logging in ApiTracer framework
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‎gax-java/gax/src/main/java/com/google/api/gax/tracing/LoggingTracer.java‎

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/*
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* Copyright 2026 Google LLC
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google LLC nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package com.google.api.gax.tracing;
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import com.google.api.core.BetaApi;
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import com.google.api.core.InternalApi;
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import com.google.api.gax.logging.LoggerProvider;
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import com.google.api.gax.logging.LoggingUtils;
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import com.google.api.gax.rpc.ApiException;
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import com.google.rpc.ErrorInfo;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* An {@link ApiTracer} that logs actionable errors using {@link LoggingUtils} when an RPC attempt
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* fails.
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*/
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@BetaApi
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@InternalApi
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public class LoggingTracer extends BaseApiTracer {
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private static final LoggerProvider LOGGER_PROVIDER =
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LoggerProvider.forClazz(LoggingTracer.class);
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private final ApiTracerContext apiTracerContext;
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public LoggingTracer(ApiTracerContext apiTracerContext) {
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this.apiTracerContext = apiTracerContext;
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}
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@Override
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public void attemptFailed(Throwable error, org.threeten.bp.Duration delay) {
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recordActionableError(error);
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}
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@Override
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public void attemptFailedDuration(Throwable error, java.time.Duration delay) {
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recordActionableError(error);
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}
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@Override
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public void attemptFailedRetriesExhausted(Throwable error) {
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recordActionableError(error);
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}
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@Override
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public void attemptPermanentFailure(Throwable error) {
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recordActionableError(error);
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}
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private void recordActionableError(Throwable error) {
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Map<String, Object> logContext = new HashMap<>();
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if (apiTracerContext.rpcSystemName() != null) {
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logContext.put(
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ObservabilityAttributes.RPC_SYSTEM_NAME_ATTRIBUTE, apiTracerContext.rpcSystemName());
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}
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if (apiTracerContext.fullMethodName() != null) {
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logContext.put(
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ObservabilityAttributes.GRPC_RPC_METHOD_ATTRIBUTE, apiTracerContext.fullMethodName());
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}
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if (apiTracerContext.serverPort() != null) {
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logContext.put(ObservabilityAttributes.SERVER_PORT_ATTRIBUTE, apiTracerContext.serverPort());
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}
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if (apiTracerContext.libraryMetadata() != null
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&& !apiTracerContext.libraryMetadata().isEmpty()) {
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if (apiTracerContext.libraryMetadata().repository() != null) {
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logContext.put(
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ObservabilityAttributes.REPO_ATTRIBUTE,
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apiTracerContext.libraryMetadata().repository());
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}
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}
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if (error instanceof ApiException) {
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ApiException apiException = (ApiException) error;
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logContext.put(
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ObservabilityAttributes.RPC_RESPONSE_STATUS_ATTRIBUTE,
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apiException.getStatusCode().getCode().toString());
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if (apiException.getErrorDetails() != null) {
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ErrorInfo errorInfo = apiException.getErrorDetails().getErrorInfo();
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if (errorInfo != null) {
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logContext.put("error.type", errorInfo.getReason());
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logContext.put("gcp.errors.domain", errorInfo.getDomain());
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for (Map.Entry<String, String> entry : errorInfo.getMetadataMap().entrySet()) {
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logContext.put("gcp.errors.metadata." + entry.getKey(), entry.getValue());
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}
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}
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}
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}
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String message = "Unknown Error";
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if (error != null) {
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message = error.getMessage() != null ? error.getMessage() : error.getClass().getName();
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}
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LoggingUtils.logActionableError(logContext, LOGGER_PROVIDER, message);
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}
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}

‎gax-java/gax/src/main/java/com/google/api/gax/tracing/LoggingTracerFactory.java‎

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/*
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* Copyright 2026 Google LLC
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google LLC nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package com.google.api.gax.tracing;
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import com.google.api.core.BetaApi;
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import com.google.api.core.InternalApi;
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/** A {@link ApiTracerFactory} that creates instances of {@link LoggingTracer}. */
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@BetaApi
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@InternalApi
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public class LoggingTracerFactory implements ApiTracerFactory {
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private final ApiTracerContext apiTracerContext;
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public LoggingTracerFactory() {
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this(ApiTracerContext.empty());
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}
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private LoggingTracerFactory(ApiTracerContext apiTracerContext) {
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this.apiTracerContext = apiTracerContext;
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}
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@Override
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public ApiTracer newTracer(ApiTracer parent, SpanName spanName, OperationType operationType) {
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return new LoggingTracer(apiTracerContext);
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}
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@Override
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public ApiTracer newTracer(ApiTracer parent, ApiTracerContext context) {
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return new LoggingTracer(context);
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}
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@Override
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public ApiTracerContext getApiTracerContext() {
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return apiTracerContext;
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}
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@Override
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public ApiTracerFactory withContext(ApiTracerContext context) {
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return new LoggingTracerFactory(apiTracerContext.merge(context));
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}
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}

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