Where is the implementation of `MinRankOfClass::convert`?

Question

In substrate ranked-collective pallet, we can see the function call.

let min_rank = T::MinRankOfClass::convert(class);

Check the code here.

In the polkadot repo, I can only find the configuration for type MinRankOfClass.

type MinRankOfClass = sp_runtime::traits::Identity;

Check the code here.

The problem is I still can not find where is the convert function implementation which works for fellowship collective(ranked-collective pallet). Could anybody help me out of this? Many thanks.

The reason I need to understand this code is I have to judge whether the rank of a fellowship member is enough to vote a fellowship referendum.

Answer 1

Here you go.

https://paritytech.github.io/substrate/master/src/sp_runtime/traits.rs.html#729-733

Just like its name said, identity.

/// A structure that performs identity conversion.
pub struct Identity;
impl<T> Convert<T, T> for Identity {
    fn convert(a: T) -> T {
        a
    }
}