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: to_bits.rs
    path of file: ./repos/snarkVM/circuit/program/src/data/plaintext
    
    the code of the file until where you have to start completion: // Copyright (C) 2019-2023 Aleo Systems Inc.
// This file is part of the snarkVM library.

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at:
// http://www.apache.org/licenses/LICENSE-2.0

// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use super::*;

impl<A: Aleo> ToBits for Plaintext<A> {
    type Boolean = Boolean<A>;

    /// Returns this plaintext as a list of **little-endian** bits.
    fn write_bits_le(&self, vec: &mut Vec<Boolean<A>>) {
        match self {
            Self::Literal(literal, bits_le) => {
                // Compute the bits of the literal.
                let bits = bits_le.get_or_init(|| {
                    let mut bits_le = vec![Boolean::constant(false), Boolean::constant(false)]; // Variant b
    
    fn write_bits_le(&self, vec: &mut Vec<Boolean<A>>) {
        match self {
            Self::Literal(literal, bits_le) => {
                // Compute the bits of the literal.
                let bits = bits_le.get_or_init(|| {
                    let mut bits_le = vec![Boolean::constant(false), Boolean::constant(false)]; // Variant bit.
                    literal.variant().write_bits_le(&mut bits_le);
                    literal.size_in_bits().write_bits_le(&mut bits_le);
                    literal.write_bits_le(&mut bits_le);
                    bits_le
                });
                // Extend the vector with the bits of the literal.
                vec.extend_from_slice(bits);
            }
            Self::Struct(members, bits_le) => {
                // Compute the bits of the struct.
                let bits = bits_le.get_or_init(|| {
                    let mut bits_le = vec![Boolean::constant(false), Boolean::constant(true)]; // Variant bit.
                    U8::constant(console::U8::new(members.len() as u8)).write_bits_le(&mut bits_le);
                    for (identifier, value) in members {
                        let value_bits = value.to_bits_le();
                        identifier.size_in_bits().write_bits_le(&mut bits_le);
                        identifier.write_bits_le(&mut bits_le);
                        U16::constant(console::U16::new(value_bits.len() as u16)).write_bits_le(&mut bits_le);
                        bits_le.extend_from_slice(&value_bits);
                    }
                    bits_le
                });
                // Extend the vector with the bits of the struct.
                vec.extend_from_slice(bits);
            }
            Self::Array(elements, bits_le) => {
                // Compute the bits of the array.
                let bits = bits_le.get_or_init(|| {
                    let mut bits_le = vec![Boolean::constant(true), Boolean::constant(false)]; // Variant bit.
                    U32::constant(console::U32::new(elements.len() as u32)).write_bits_le(&mut bits_le);
                    for value in elements {
                        let value_bits = value.to_bits_le();
                        U16::constant(console::U16::new(value_bits.len() as u16)).write_bits_le(&mut bits_le);
                        bits_le.extend(value_bits);
                    }
                    bits_le
                });
                // Extend the vector with the bits of the array.
                vec.extend_from_slice(bits);
            }
        }
    }