How to export wallet in indy

I created wallet using indy sdk in my android application, Now i want to export that wallet.
I tried with function but enable to do it.
My question is what should be accepted parameter for that function.

exportWallet(Wallet wallet,String exportConfigJson)

  1. wallet obj is clear.
  2. exportConfigJson = { “path”: “which path i need to pass ? it’s path where file will export ? or some thing else” , “key”:“i am just passing normal string like (123123)”}

can you please help me out

path is a path on your filesystem to the file which will hold the backup.
For key may be used passphrase (normal string). By default it will derive key using ARGON2I_MOD method.