How to port to different versions

[SENTHIN]

So I'm new to making mods, and I'm trying to import this 

import net.minecraftforge.fml.LogicalSidedProvider

but I'm getting an error saying that LogicalSidedProvider doesn't exist, 

import net.minecraftforge.fml.LogicalSide;

Exists, but the SidedProvider doesn't so I'm wondering, is there a place where I can see the changes in classes between different Forge versions also if there is another way of Doing LogicalSide without using that specific class please let me know

[warjort]

https://github.com/MinecraftForge/MinecraftForge/search?q=logicalsidedprovider

https://forge.gemwire.uk/wiki/Sides