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: variable_fields.rs
    path of file: ./repos/ezno/parser/src
    
    the code of the file until where you have to start completion: /// Contains:
/// - [`VariableId`] given to variable declaring items
/// - [`VariableField`] for destructuring things and its nested derivatives + visiting behavior + tests for self
use std::fmt::Debug;

use crate::{
	derive_ASTNode,
	errors::parse_lexing_error,
	parse_bracketed,
	property_key::PropertyKey,
	throw_unexpected_token_with_token,
	tokens::token_as_identifier,
	visiting::{ImmutableVariableOrProperty, MutableVariableOrProperty},
	ASTNode, Expression, ListItem, Marker, ParseError, ParseErrors, ParseOptions, ParseResult,
	Span, TSXToken, Token, VisitOptions, Visitable, WithComment
    
	fn array() {
		assert_matches_ast!(
			"[x, y, z]",
			VariableField::Array(
				Deref @ [WithComment::None(ArrayDestructuringField::Name(
					VariableField::Name(VariableIdentifier::Standard(Deref @ "x", span!(1, 2))),
					None,
				)), WithComment::None(ArrayDestructuringField::Name(
					VariableField::Name(VariableIdentifier::Standard(Deref @ "y", span!(4, 5))),
					None,
				)), WithComment::None(ArrayDestructuringField::Name(
					VariableField::Name(VariableIdentifier::Standard(Deref @ "z", span!(7, 8))),
					None,
				))],
				_,
			)
		);

		assert_matches_ast!(
			"[x,,z]",
			VariableField::Array(
				Deref @ [WithComment::None(ArrayDestructuringField::Name(
					VariableField::Name(VariableIdentifier::Standard(Deref @ "x", span!(1, 2))),
					None,
				)), WithComment::None(ArrayDestructuringField::None), WithComment::None(ArrayDestructuringField::Name(
					VariableField::Name(VariableIdentifier::Standard(Deref @ "z", span!(4, 5))),
					None,
				))],
				span!(0, 6),
			)
		);
	}