use Red; unit model Red::Migration::Column is table<red_migration_column>; has UInt $!id is serial; has Str $.name is column is required; has Str $.type is column is required; has Str $.references-table is column{ :nullable }; has Str $.references-column is column{ :nullable }; has Bool $.is-id is column = False; has Bool $.is-auto-increment is column = False; has Bool $.is-nullable is column = False; has UInt $.table-id is referencing{ :column<id>, :model<Red::Migration::Table>} has $.table is relationship( { .table-id }, :model<Red::Migration::Table>)