What does this Zig snippet output?

1const std = @import("std");
2const Point = struct {
3    x: i32,
4    y: i32,
5    fn sum(self: Point) i32 {
6        return self.x + self.y;
7    }
8};
9pub fn main() void {
10    const p = Point{ .x = 10, .y = 20 };
11    std.debug.print("{d}\n", .{p.sum()});
12}