RssItem optional content:encoded

[BrunoPereira-2331]

Its possible to the RssItem have a optional encoded parameter when finding the content element?
I had a problem to get the content from the blog of the companie client. The content of the blog was returning null every time, then i figure out was the content:encoded in the RssItem, i had to extends some classes to remove the content:encoded from RssItem class, after this the content was returning correctly.