Function call_by::from_ref

pub fn from_ref<'a, T: By<'a, Ref>>(by_ref: &'a T) -> T::Type

Safe, zero-cost cast from &'a T to <T as By<'a, Ref>>::Type.

Rust’s type system does not always know that &'a T is <T as By<'a, Ref>>::Type for all 'a. This function safely converts from the former to the latter.