@Nullable
    protected static Decompressor clientDecompressor(HttpHeaders headers, DecompressorRegistry registry) {
        final String encoding = headers.get(GrpcHeaderNames.GRPC_ENCODING);
        if (encoding == null) {
            return ForwardingDecompressor.forGrpc(Identity.NONE);
        }
        final io.grpc.Decompressor decompressor = registry.lookupDecompressor(encoding);
        if (decompressor != null) {
            return ForwardingDecompressor.forGrpc(decompressor);
        }
        return ForwardingDecompressor.forGrpc(Identity.NONE);
    }
Cancels a call when the call was closed by a client, not by server.
grpc/src/main/java/com/linecorp/armeria/internal/server/grpc/AbstractServerCall.java