@Override
    public void close() {
        if (closed) {
            return;
        }
        closed = true;
        if (buf != null) {
            buf.release();
        } else {
            assert stream != null;
            try {
                stream.close();
            } catch (IOException e) {
                // Ignore silently
            }
        }
    }
Returns {@code true} if this message is trailer.
grpc-protocol/src/main/java/com/linecorp/armeria/common/grpc/protocol/DeframedMessage.java