private void consumeRequestContent() {
            if (content.isConnected()) return;
            try {
                ReadableContentChannel requestContent = content.toReadable();
                while (requestContent.read() != null) {
                    // consume all ignored content
                }
            } catch (IllegalStateException ignored) {}
        }
<p>Implement this method if you want to access the {@link Request}'s content using a {@link ContentInputStream}.
If you do not override this method, it will dispatch a {@link Response} to the {@link ResponseHandler} with a
<code>Response.Status.NOT_IMPLEMENTED</code> status.</p>

@param request         The Request to handle.
@param responseHandler The handler to pass the corresponding {@link Response} to.
@param requestContent  The content of the Request.
jdisc_core/src/main/java/com/yahoo/jdisc/handler/ThreadedRequestHandler.java