gistfile1.ts

export class ParentAvro extends BaseAvroRecord {
    public static readonly schema: object = {}; // here is some schema object

    @MyAvroDecorator(() => ChildAvro) // <-- Note the decorator
    public child: ChildAvro;
   
    public get schema(): object {
        return ParentAvro.schema;
    }
}

export class ChildAvro extends BaseAvroRecord {
    public static readonly schema: object = {}; // here is some schema object

    public someProperty: string;
   
    public get schema(): object {
        return ChildAvro.schema;
    }
}