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: mod.rs
    path of file: ./repos/reth/crates/storage/db/src/tables
    
    the code of the file until where you have to start completion: //! Tables and data models.
//!
//! # Overview
//!
//! This module defines the tables in reth, as well as some 
    
            fn from_str(s: &str) -> Result<Self, Self::Err> {
                match s {
                    $(
                        table_names::$name => Ok(Self::$name),
                    )*
                    s => Err(format!("unknown table: {s:?}")),
                }
            }