public void printElement() {
		System.out.print("AGREGATION CONTAINER ");
		System.out.print(this.container.getIdentifier() + " : " + this.container.getMultiplicity());
		System.out.print("      PARTS ");
		for(Role role : parts){
			System.out.print(role.getIdentifier() + " : " + role.getMultiplicity() + ", ");
		}
		System.out.println();
	}