You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: validation_state.rs
    path of file: ./repos/pydantic-core/src/validators
    
    the code of the file until where you have to start completion: use crate::recursion_guard::{ContainsRecursionState, RecursionState};

use super::Extra;

#[derive(Clone, Copy, Debug, PartialEq, Eq, Ord, PartialOrd, Hash)]
pub enum Exactness {
    Lax,

    
    pub fn new(extra: Extra<'a>, recursion_guard: &'a mut RecursionState) -> Self {
        Self {
            recursion_guard, // Don't care about exactness unless doing union validation
            exactness: None,
            extra,
        }
    }