create type foo as (
	id integer,
	domain varchar
);

create function bar() returns foo as $$
declare foo_package foo;
begin
	foo_package.id = 1;
	foo_package.domain = 'example.com';
	return foo_package;
end;
$$ language 'plpgsql';

insert into helloworld (id, domain) values((foo_package).*);