docs: protected DBInstance getDbInstance(String identifier) throws IllegalStateException {
  		DBInstance instance;
  		try {
  			DescribeDBInstancesResult describeDBInstancesResult = this.amazonRds
  					.describeDBInstances(new DescribeDBInstancesRequest()
  							.withDBInstanceIdentifier(identifier));
  			instance = describeDBInstancesResult.getDBInstances().get(0);
  		}
  		catch (DBInstanceNotFoundException e) {
  			throw new IllegalStateException(MessageFormat.format(
  					"No database instance with id:''{0}'' found. Please specify a valid db instance",
  					identifier));
  		}
  		return instance;
  	}