@NotNull Collection<@NotNull PsiSymbolReferenceProvider> getNamedReferenceProviders(@NotNull Symbol target) {
    return myByTargetClass.computeIfAbsent(target.getClass(), NamedReferenceProviders::byTargetClassInner);
  }
@NotNull Collection<@NotNull PsiSymbolReferenceProvider> getNamedReferenceProviders(@NotNull Symbol target)