PsiElement (PsiElement callExpression, Object substitutor) { final IntroduceParameterObjectDelegate<PsiNamedElement, ParameterInfo, IntroduceParameterObjectClassDescriptor<PsiNamedElement, ParameterInfo>> delegate = findDelegate(callExpression); return delegate != null ? delegate.createNewParameterInitializerAtCallSite(callExpression, descriptor, oldMethodParameters, substitutor) : null; }