Macro decl_test_networks

macro_rules! decl_test_networks {
    (
		$(
			pub struct $name:ident {
				relay_chain = $relay_chain:ident,
				parachains = vec![ $( $parachain:ident, )* ],
				bridge = $bridge:ty
			}
		),
		+
		$(,)?
	) => { ... };
}