The former Marseille man, who spent much of his first season at the club on the sidelines, has been lauded for a string of recent performances. Meanwhile, Williamson insists that the Frenchman's form will be vital in the final stretch.
"I'm just glad to have him on our side," he told the Evening Chronicle.
"He can score goals out of nothing and that's hard for defences to cope with. His last goal against Bolton spoke for itself.
"It was a phenomenal piece of skill. It would be great to see more in the final few games."
The Magpies are in fifth place in the Premier League.