public void removeLink(ErdNode erdNode) throws Exception{
		//To check that there list contain the node to be removed		
		if(!this.link.remove(erdNode)){
			final String ErdNodeNotInsideLinkExceptionMessage = "The node "
					+ erdNode.getTableName()
					+ "is not inside the link of ERD Node " + this.tableName
					+ ".";

			throw new MainException(ErdNodeNotInsideLinkExceptionMessage);
		}
	}