code: protected boolean isWritable(WriterInterceptorContext context) {
          return context.getEntity() != null
                  && !Boolean.FALSE.equals(requestProvider.get().getProperty(MessageHelper.STREAMING_RANGE_ENABLED))
                  && context.getHeaders().containsKey(HttpHeaders.CONTENT_LENGTH)
                  && !(context.getEntity() instanceof MediaStreaming);
      }
docs: <p>isWritable.</p>
  
  @param context a {@link javax.ws.rs.ext.WriterInterceptorContext} object.
  @return a boolean.