register types loaders

registerTypeLoader.ts

export type DataLoaderKey = string | Types.ObjectId | Object;

export type Load = (context: GraphQLContext, id: DataLoaderKey) => any;
type TypeLoaders = {
  [key: string]: {
    type: GraphQLObjectType,
    load: Load,
  };
};

const typesLoaders: TypeLoaders = {};
export const registerTypeLoader = (type: GraphQLObjectType, load: Load) => {
  typesLoaders[type.name] = {
    type,
    load,
  };

  return type;
};