How to use variant of font

[Dinesh-0098]

Hello, I actually want open-sans font and it's variants like bold, semi-bold, light, light-italic, etc. But don't know exactly I can use it using your library, or don't even know am I able to do this with your library.
So, as you said you have tried to add all google fonts that's why I am assuming you have also added variants of fonts too.
And Requesting you to guide me on how can I use it with this library of yours.

Hoping a quick reply from your side.

Thanks