fetch_questions() no puede ver process_questions() desde dentro de la función $.get()

¿Qué debo hacer?

 class trivia { fetch_questions(){ $.get( "/myurl/fetch.php?difficulty=" + this.difficulty + "&question_count=" + this.question_count + "&search=" + this.category, function( data ) { this.process_questions(); }); } process_questions(){ console.log("suck"); } }