public void pushToLeftParticipantBox(double deltaX, Pushable firstToChange, boolean including) {
		if (deltaX <= 0) {
			throw new IllegalArgumentException();
		}
		if (firstToChange == null) {
			throw new IllegalArgumentException();
		}
		// freeX += deltaX;
		boolean founded = false;
		for (Pushable box : participantList) {
			if (box.equals(firstToChange)) {
				founded = true;
				if (including == false) {
					continue;
				}
			}
			if (founded) {
				box.pushToLeft(deltaX);
			}
		}
	}