code: public void getMovementArea(State state, RectF out) {
          movBounds.set(state).getExternalBounds(out);
      }
docs: Calculates area in which {@link State#getX()} &amp; {@link State#getY()} values can change.
  Note, that this is different from {@link Settings#setMovementArea(int, int)} which defines
  part of the viewport in which image can move.
  
  @param state Current state
  @param out Output movement area rectangle