/**
* Returns an {@code Actor} of the given class, regardless of the location on the {@code World} ,
* or null if there is none. If there are multiple possible {@code Actor} that could be returned,
* an arbitrary {@code Actor} is returned.
*
* @param <T> the generic type of the class to be returned
* @param cls the {@code Class<T extends Actor>} of the {@code Actor} to be returned
* @return an {@code Actor} of the given class
*/
public <T extends Actor> T getActor(Class<T> cls) {
return Lambda.first(Lambda.filterType(register, cls));
}
/**
* Returns an {@code Actor} of the given class located at (x, y), or null if there is none. If
* there are multiple possible {@code Actor} that could be returned, an arbitrary {@code Actor} is
* returned.
*
* @param <T> the generic type of the class to be returned
* @param cls the {@code Class<T extends Actor>} of the {@code Actor} to be returned
* @param x the x location being queried
* @param y the y location being queried
* @return an {@code Actor} of the given class located at (x, y)
*/
public <T extends Actor> T getActorAt(Class<T> cls, int x, int y) {
return Lambda.first(Lambda.filterType(grid[x][y].actors, cls));
}