pub struct CrateEnv(_);
A collection of crates that are required for the evaluation of some expression.
Adds a crate to this collection. This can be called concurrently and without mut.
mut
TypeId
self
Returns the argument unchanged.
Calls U::from(self).
U::from(self)
That is, this conversion is whatever the implementation of From<T> for U chooses to do.
From<T> for U