pub enum FunctionBody {
    Pointer(fn(_: &mut Context, _: &Registry)),
    Closure(Arc<dyn Fn(&mut Context, &Registry)>),
}
Formats the value using the given formatter. 
Read more
Immutably borrows from an owned value. 
Read more
Mutably borrows from an owned value. 
Read more
Returns the argument unchanged.
Calls U::from(self).
That is, this conversion is whatever the implementation of
From<T> for U chooses to do.
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.