Can't find method

[AlexanderXIV]

I just tried libsodium on Android, using methods like Sodium.crypto_box_keypair(...) which work really great. I' ve also tried to use password hashing (using this example). The funny thing is that Sodium.crypto_pwhash is found and Sodium.crypto_pwhash_opslimit_interactive() is not found. Does anyone have a workaround for this?
I am glad for any help