How to make block optional if the value for the below block not provided? const BackupType=new TerraformVariable(this,"BackupType",{ description:"(Require
time.h
power-saving
android-togglebutton
vuex
rtweet
nivo-react
shared-primary-key
sparql
python-cloudant
gitweb
python-venv
spinbox
cron-task
avspeechutterance
configuration-management
reactive-postgresql-client
rust-gnome
orchardcore
saas
linker-warning
slackr
billingclient
terratest
domo
netbeans-7.2
facebook-ios-sdk
emit
android-4.2-jelly-bean
dse
dvi
