const std = @import("std") ;
  const print = std.debug.print ;
  
  pub fn main() void {
  
    const simple_none : ?u8 = null ;
  
    const double_optional_none : ??u8 = null ;
  
    const double_optional_some_none : ??u8 = simple_none ;

    print("none equals some none: {}", .{ double_optional_none == double_optional_some_none });
    // prints none equals some none: false
  
  }