Macro assert_abi 

macro_rules! assert_abi {
    ($abi:path $(,)?) => { ... };
    ($abi:path, $snapshot_dir:expr $(,)?) => { ... };
}

Assert that a generated xabi contract layout matches its committed snapshot.

The first argument is a generated ABI type from #[xabi::xabi]. The optional second argument overrides the snapshot directory, which defaults to xabi/snapshots.

xabi_assert::assert_abi!(XabiV1AbiTraitDemo, "xabi/snapshots");