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: meta.rs
    path of file: ./repos/time/tests
    
    the code of the file until where you have to start completion: // Prefer runtime checks if possible, as otherwise tests can't be run at all if something is
// changed.

use std::borrow::Borrow;
use std::error::Error as StdError;
use std::fmt::{Debug, Display};
use std::hash::Hash;
use std::iter::Sum;
use std::ops::{Add, AddAssign, Div, DivAssign, Mul, MulAssign, Neg, Sub, SubAssign};
use std::panic::{RefUnwindSafe, UnwindSafe};
use std::time::{Duration as StdDuration, Instant as StdInstant, SystemTime};

use quickcheck::Arbitrary;
use rand::distributions::{Distribution, Standard};
use serde::{Deseriali
    
fn size() {
    macro_rules! assert_size {
        ($t:ty, $size:literal, $opt_size:literal) => {
            assert!(
                ::core::mem::size_of::<$t>() <= $size,
                concat!("size of `{}` used to be ", $size, ", but is now {}"),
                stringify!($t),
                ::core::mem::size_of::<$t>(),
            );
            assert!(
                ::core::mem::size_of::<Option<$t>>() <= $opt_size,
                concat!(
                    "size of `Option<{}>` used to be ",
                    $opt_size,
                    ", but is now {}"
                ),
                stringify!($t),
                ::core::mem::size_of::<Option<$t>>(),
            );
        };
    }

    assert_size!(Date, 4, 4);
    assert_size!(Duration, 16, 16);
    assert_size!(OffsetDateTime, 16, 16);
    assert_size!(PrimitiveDateTime, 12, 12);
    assert_size!(Time, 8, 8);
    assert_size!(UtcOffset, 3, 4);
    assert_size!(error::ComponentRange, 48, 48);
    assert_size!(error::ConversionRange, 0, 1);
    assert_size!(error::DifferentVariant, 0, 1);
    assert_size!(error::IndeterminateOffset, 0, 1);
    assert_size!(modifier::Day, 1, 1);
    assert_size!(modifier::Hour, 2, 2);
    assert_size!(modifier::Minute, 1, 1);
    assert_size!(modifier::Month, 3, 3);
    assert_size!(modifier::OffsetHour, 2, 2);
    assert_size!(modifier::OffsetMinute, 1, 1);
    assert_size!(modifier::OffsetSecond, 1, 1);
    assert_size!(modifier::Ordinal, 1, 1);
    assert_size!(modifier::Period, 2, 2);
    assert_size!(modifier::Second, 1, 1);
    assert_size!(modifier::Subsecond, 1, 1);
    assert_size!(modifier::WeekNumber, 2, 2);
    assert_size!(modifier::Weekday, 3, 3);
    assert_size!(modifier::Year, 4, 4);
    assert_size!(well_known::Rfc2822, 0, 1);
    assert_size!(well_known::Rfc3339, 0, 1);
    assert_size!(
        well_known::Iso8601<{ iso8601::Config::DEFAULT.encode() }>,
        0,
        1
    );
    assert_size!(iso8601::Config, 7, 7);
    assert_size!(iso8601::DateKind, 1, 1);
    assert_size!(iso8601::FormattedComponents, 1, 1);
    assert_size!(iso8601::OffsetPrecision, 1, 1);
    assert_size!(iso8601::TimePrecision, 2, 2);
    assert_size!(Parsed, 56, 56);
    assert_size!(Month, 1, 1);
    assert_size!(Weekday, 1, 1);
    assert_size!(Error, 56, 56);
    assert_size!(error::Format, 24, 24);
    assert_size!(error::InvalidFormatDescription, 48, 48);
    assert_size!(error::Parse, 48, 48);
    assert_size!(error::ParseFromDescription, 24, 24);
    assert_size!(error::TryFromParsed, 48, 48);
    assert_size!(Component, 6, 6); // TODO Size is 4 starting with rustc 1.71.
    assert_size!(FormatItem<'_>, 24, 24);
    assert_size!(modifier::MonthRepr, 1, 1);
    assert_size!(modifier::Padding, 1, 1);
    assert_size!(modifier::SubsecondDigits, 1, 1);
    assert_size!(modifier::WeekNumberRepr, 1, 1);
    assert_size!(modifier::WeekdayRepr, 1, 1);
    assert_size!(modifier::YearRepr, 1, 1);
}