@Contract(value = "null -> null", pure = true)
  @Nullable
  public static JvmPrimitiveTypeKind getKindByFqn(@Nullable String fqn) {
    return ourFqnToKind.get(fqn);
  }
@Contract(value = "null -> null", pure = true)
  @Nullable
  public static JvmPrimitiveTypeKind getKindByFqn(@Nullable String fqn)