Metadata missing class - possible fix

// The exportedMetadataname is already used for exporting the "raw" JSON metadata type. // Then,Metadataclass has become exported, but its name is already taken, so TypeScript users seem to be unable to use theMetadataclass. // If someone knows a solution then they could propose it in an issue. // export class Metadata { // ... // }

about that: you can rename type Metadata to MetadataConfig

and create typings :

interface LeadingDigitsFn {
  (): string | undefined;
}

interface NumberingPlan {
  leadingDigits: LeadingDigitsFn;
}

export class Metadata {
  constructor(config: MetadataConfig) {}

  public country(country: CountryCode): void;

  public numberingPlan: NumberingPlan;
}

and create also file metadata.min.json.d.ts with content

import { MetadataConfig } from './types';

declare const minMetadataData: MetadataConfig;
export default minMetadataData;

and import-export it from other d.ts

here is my patch for version 1.9.26: https://pastebin.com/X2vwqYBF