@Nonnull
@Override
public <T, P> ParameterizedCachedValue<T, P> createParameterizedCachedValue(@Nonnull ParameterizedCachedValueProvider<T, P> provider, boolean trackValue) {
  return new PsiParameterizedCachedValue<>(myManager, provider, trackValue);
}
 

@Override
public void injectLanguages(@Nonnull MultiHostRegistrar registrar, @Nonnull PsiElement context) {
  ConcatenationInjectorManager manager = getInstance(myProject);
  if (manager.myConcatenationInjectors.isEmpty()) {
    return;
  }

  final PsiFile containingFile = ((InjectionRegistrarImpl)registrar).getHostPsiFile();
  Project project = containingFile.getProject();
  long modificationCount = PsiManager.getInstance(project).getModificationTracker().getModificationCount();
  Pair<PsiElement, PsiElement[]> pair = computeAnchorAndOperands(context);
  PsiElement anchor = pair.first;
  PsiElement[] operands = pair.second;
  Integer noInjectionTimestamp = anchor.getUserData(NO_CONCAT_INJECTION_TIMESTAMP);

  InjectionResult result;
  ParameterizedCachedValue<InjectionResult, PsiElement> data = null;
  if (operands.length == 0 || noInjectionTimestamp != null && noInjectionTimestamp == modificationCount) {
    result = null;
  }
  else {
    data = anchor.getUserData(INJECTED_PSI_IN_CONCATENATION);

    result = data == null ? null : data.getValue(context);
    if (result == null || !result.isValid()) {
      result = doCompute(containingFile, project, anchor, operands);
    }
  }
  if (result != null) {
    ((InjectionRegistrarImpl)registrar).addToResults(result);

    if (data == null) {
      CachedValueProvider.Result<InjectionResult> cachedResult = CachedValueProvider.Result.create(result, manager);
      data = CachedValuesManager.getManager(project).createParameterizedCachedValue(context1 -> {
        PsiFile containingFile1 = context1.getContainingFile();
        Project project1 = containingFile1.getProject();
        Pair<PsiElement, PsiElement[]> pair1 = computeAnchorAndOperands(context1);
        InjectionResult result1 = pair1.second.length == 0 ? null : doCompute(containingFile1, project1, pair1.first, pair1.second);
        return result1 == null ? null : CachedValueProvider.Result.create(result1, manager);
      }, false);
      ((PsiParameterizedCachedValue<InjectionResult, PsiElement>)data).setValue(cachedResult);

      anchor.putUserData(INJECTED_PSI_IN_CONCATENATION, data);
      if (anchor.getUserData(NO_CONCAT_INJECTION_TIMESTAMP) != null) {
        anchor.putUserData(NO_CONCAT_INJECTION_TIMESTAMP, null);
      }
    }
  }
  else {
    // cache no-injection flag
    if (anchor.getUserData(INJECTED_PSI_IN_CONCATENATION) != null) {
      anchor.putUserData(INJECTED_PSI_IN_CONCATENATION, null);
    }
    anchor.putUserData(NO_CONCAT_INJECTION_TIMESTAMP, (int)modificationCount);
  }
}
 

<T, P> ParameterizedCachedValue<T, P> createParameterizedCachedValue(@Nonnull ParameterizedCachedValueProvider<T, P> provider, boolean trackValue);