Define a method named roleOf that takes the name of an actor as an argument and returns that actor's role. If the actor is not in the movie return "Not in this movie.". Ex: roleOf("Tom Hanks") returns "Forrest Gump". Hint: A method may access the object's properties using the keyword this. Ex: this. cast accesses the object's cast property.

roleOf: function(actorName) {

   if(!(actorName in this.cast)) {

       return "Not in this movie.";

   }

   return this.cast[actorName];

}

Explanation:

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