I have a trait

pub trait FromContext {
    fn from_context<T>(context: Context<T>) -> Result<Self>;
}

and I would like to have an implementation of that trait like this

pub struct State<T>(pub T);

impl<T> FromContext for State<T> {
    fn from_context<T>(context: Context<T>) -> Result<Self> {
        Result::Ok(State(context.state))
    }
}

but I get the error

error[E0403]: the name `T` is already used for a generic parameter in this item's generic parameters

I also tried

impl<T1> FromContext for State<T1> {
    fn from_context<T2>(context: Context<T2>) -> Result<Self> {
        Result::Ok(State(context.state))
    }
}

but then I get

error[E0308]: mismatched types

Is there anyway to tell Rust T1 and T2 should be equal?