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Okay, let’s (change case and) add it:

`rt = ec2.RouteTable('new-rt', vpc_id = vpc.id, routes = [{'gateway_id': igw.id}], destination_cidr_block = '0.0.0.0/0')`

Now it doesn’t even preview:

```rt = ec2.RouteTable('new-rt', vpc_id = vpc.id, routes = [{'gateway_id': igw.id}], destination_cidr_block = '0.0.0.0/0')
    TypeError: __init__() got an unexpected keyword argument 'destination_cidr_block'```