code: public Settings setMovementArea(int width, int height) {
          isMovementAreaSpecified = true;
          movementAreaW = width;
          movementAreaH = height;
          return this;
      }
docs: Setting movement area size. Viewport area will be used instead if no movement area is
  specified.
  
  @param width Movement area width
  @param height Movement area height
  @return Current settings object for calls chaining