Method getSupertypes

src/resolution/types.ts:93–93

* Direct supertypes of the type named `typeName` (same language): the classes * it extends and the interfaces / protocols / traits it implements/conforms to, * by simple name. Backed by the resolved `implements`/`extends` edges, so it is * EMPTY during the first resolution pass (edges aren'

(typeName: string, language: Language)

   * method). Optional so external/test contexts compile without it.
   */
  getSupertypes?(typeName: string, language: Language): string[];
  /**
   * Look up a node by its id. Lets matchers derive the FROM-symbol's
   * enclosing-class scope (Swift implicit-self method scoping, `this.X`