private PsiType getExpectedReturnType() {
    return myCodeFragmentMember instanceof PsiMethod
                                        ? ((PsiMethod)myCodeFragmentMember).getReturnType()
                                        : myCodeFragmentMember instanceof PsiLambdaExpression
                                          ? LambdaUtil.getFunctionalInterfaceReturnType((PsiLambdaExpression)myCodeFragmentMember)
                                          : null;
  }
private PsiType getExpectedReturnType()