anchor.diff:      apply ? null,
       # Whether the option is for NixOS developers only.
       internal ? null,
  -    # Whether the option shows up in the manual.
  +    # Whether the option shows up in the manual. Default: true. Use false to hide the option and any sub-options from submodules. Use "shallow" to hide only sub-options.
       visible ? null,
       # Whether the option can be set only once
       readOnly ? null,
  
positive.code:         subOptions =
            let ss = opt.type.getSubOptions opt.loc;
            in if ss != {} then optionAttrSetToDocList' opt.loc ss else [];
        in
          [ docOption ] ++ optionals docOption.visible subOptions) (collect isOption options);
  
  
    /* This function recursively removes all derivation attributes from
  
negative.code:           description = opt.description or (lib.warn "Option `${name}' has no description." "This option has no description.");
            declarations = filter (x: x != unknownModule) opt.declarations;
            internal = opt.internal or false;
            visible =
              if (opt?visible && opt.visible == "shallow")
              then true
              else opt.visible or true;
            readOnly = opt.readOnly or false;
            type = opt.type.description or null;
          }
  