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/Pleco/pleco_engine/src/tables
    
    the code of the file until where you have to start completion: pub mod butterfly;
pub mod capture_piece_history;
pub mod continuation;
pub mod counter_move;
pub mod material;
pub mod pawn_table;

use std::al
    
    pub fn new() -> Option<TableBase<T>> {
        if T::ENTRY_COUNT.count_ones() != 1 {
            None
        } else {
            unsafe {
                let table = TableBase {
                    table: TableBase::alloc(),
                };
                Some(table)
            }
        }
    }