# File lib/aws/ec2/network_acl/association.rb, line 45
        def replace_network_acl network_acl
          acl_id = network_acl.is_a?(NetworkACL) ? network_acl.id : network_acl
          subnet.client.replace_network_acl_association(
            :association_id => association_id,
            :network_acl_id => acl_id)
          nil
        end