public DataBuffer toDataBuffer(HttpData httpData) {
        requireNonNull(httpData, "httpData");
        if (!httpData.isPooled()) {
            return delegate.wrap(ByteBuffer.wrap(httpData.array()));
        }
        return converter.apply(httpData);
    }
Converts an {@link HttpData} into a {@link DataBuffer}.
spring/spring6/src/main/java/com/linecorp/armeria/spring/internal/common/DataBufferFactoryWrapper.java