1interface common {
 2    /// A (half-open) range (`[start, end)`).
 3    record range {
 4        /// The start of the range (inclusive).
 5        start: u32,
 6        /// The end of the range (exclusive).
 7        end: u32,
 8    }
 9
10    /// A list of environment variables.
11    type env-vars = list<tuple<string, string>>;
12}