@pothos/core/src/fieldUtils/interface.ts

Pothos (formerly GiraphQL) is a plugin based schema builder for creating code-first GraphQL schemas in typescript

import type { SchemaTypes } from '../types';
import { FieldBuilder } from './builder';

export class InterfaceFieldBuilder<Types extends SchemaTypes, ParentShape> extends FieldBuilder<
  Types,
  ParentShape,
  'Interface'
> {
  constructor(builder: PothosSchemaTypes.SchemaBuilder<Types>) {
    super(builder, 'Interface', 'Interface');
  }
}