(UI 0.9.9)
A Grid is a control which is allows the arrangement of children into a grid
$control
$left
$top
$xspan
$yspan
$hexpand
$halign
$vexpand
$valign
$padding
$parent
UI\Controls\Grid::Fill
UI\Controls\Grid::Start
UI\Controls\Grid::Center
UI\Controls\Grid::End
UI\Controls\Grid::Leading
UI\Controls\Grid::Top
UI\Controls\Grid::Trailing
UI\Controls\Grid::Bottom
Contains controls, should not be manipulated directly