visible

function visible(

  var a: TGtkCellRenderer

):guint; overload;

function visible(

  var a: TGtkCListColumn

):guint; overload;

function visible(

  var a: TGtkEntry

):guint; overload;

function visible(

  var a: TGtkOldEditable

):guint; overload;

function visible(

  var a: TGtkTextMarkBody

):guint; overload;

function visible(

  var a: TGtkTreeViewColumn

):guint; overload;