core/http-auth-aws/src/main/java/software/amazon/awssdk/http/auth/aws/crt/internal/signer/AwsChunkedV4aPayloadSigner.java [239:253]:
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    private void setupChecksumTrailerIfNeeded(ChunkedEncodedInputStream.Builder builder) {
        if (checksumAlgorithm == null) {
            return;
        }
        String checksumHeaderName = checksumHeaderName(checksumAlgorithm);
        SdkChecksum sdkChecksum = fromChecksumAlgorithm(checksumAlgorithm);
        ChecksumInputStream checksumInputStream = new ChecksumInputStream(
            builder.inputStream(),
            Collections.singleton(sdkChecksum)
        );

        TrailerProvider checksumTrailer = new ChecksumTrailerProvider(sdkChecksum, checksumHeaderName);

        builder.inputStream(checksumInputStream).addTrailer(checksumTrailer);
    }
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core/http-auth-aws/src/main/java/software/amazon/awssdk/http/auth/aws/internal/signer/AwsChunkedV4PayloadSigner.java [258:272]:
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    private void setupChecksumTrailerIfNeeded(ChunkedEncodedInputStream.Builder builder) {
        if (checksumAlgorithm == null) {
            return;
        }
        String checksumHeaderName = checksumHeaderName(checksumAlgorithm);
        SdkChecksum sdkChecksum = fromChecksumAlgorithm(checksumAlgorithm);
        ChecksumInputStream checksumInputStream = new ChecksumInputStream(
            builder.inputStream(),
            Collections.singleton(sdkChecksum)
        );

        TrailerProvider checksumTrailer = new ChecksumTrailerProvider(sdkChecksum, checksumHeaderName);

        builder.inputStream(checksumInputStream).addTrailer(checksumTrailer);
    }
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