Trait LabelKey 

pub trait LabelKey:
    Spelled
    + Copy
    + 'static { }

A caller-declared output-column name, generated by label!{}. Being a marker over Named is what keeps label!{} the only way to make one, and Named::NAME the only place the name is written.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors