String getVeryDeepMessage()
}

interface ShallowChildModel extends BaseModel {
    String getShallowMessage()
}

interface SideModel extends BaseModel {
}

interface CompositeModel {
    BaseModel getNested()

                private final DefaultModel nested
                DefaultCompositeModel(DefaultModel nested) { this.nested = nested }
                BaseModel getNested() { nested }
            }
        """
    }

    def "supports model polymorphism"() {
        given:
        file("plugins/src/main/groovy/my/MyModelBuilder.groovy") << """
            package my

    auto outlined_func = OpBuilder(ctx).create<func::FuncOp>(island_op.getLoc(),
                                                             name, func_type);
    outlined_symbol_table.insert(outlined_func);
    outlined_func.setNested();

    // We will "steal" the body of the island and replace it with a call to the
    // new function later.
    {
      YieldOp yield_op = island_op.GetYield();