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: primitive_array.rs
    path of file: ./repos/type-exercise-in-rust/archive/day4/src/array
    
    the code of the file until where you have to start completion: // Copyright 2022 Alex Chi. Licensed under Apache-2.0.

//! Primitive array and array builders.
//!
//! This module implements array for primitive types, like `i32` and `f32`.

use bitvec::prelude::Bit
    
    fn push(&mut self, value: Option<T>) {
        match value {
            Some(v) => {
                self.data.push(v);
                self.bitmap.push(true);
            }
            None => {
                self.data.push(T::default());
                self.bitmap.push(false);
            }
        }
    }